2001
Flynn, R Y; Scott, T R D; Heasman, J M; Airdrie, A; Vare, V A; van, DeurzenB.
In: Triolo, R J (Ed.): pp. 063, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_063,
title = {The Detection of Discrete Regions of Hand-Object Contact Area and its Relationship to Quality of Grip in Persons with Tetraplegia},
author = {R Y Flynn and T R D Scott and J M Heasman and A Airdrie and V A Vare and DeurzenB. van},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_063_Flynn.pdf},
year = {2001},
date = {2001-07-01},
pages = {063},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Contact area and the maximum holding force during tenodesis grasp in three subjects with spinal cord injury in the C6 region were examined. Hand-object contact area was measured when a polycarbonate cylinder was grasped. Subsequently, a servomotor applied an increasing force to a similar object held by the hand until the object was displaced. The maximum holding force (N) of the hand was measured. Correlations were made between the measured object-hand contact area and the maximum object holding force. Additional correlations were performed between the contact area and the holding force whilst normalising for the subjects grip force. Both results are presented. Correlation of regional contact area and grasp holding force is likely to provide insight into the provision of grip with an optimised holding force via the manipulation of contact area.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Contact area and the maximum holding force during tenodesis grasp in three subjects with spinal cord injury in the C6 region were examined. Hand-object contact area was measured when a polycarbonate cylinder was grasped. Subsequently, a servomotor applied an increasing force to a similar object held by the hand until the object was displaced. The maximum holding force (N) of the hand was measured. Correlations were made between the measured object-hand contact area and the maximum object holding force. Additional correlations were performed between the contact area and the holding force whilst normalising for the subjects grip force. Both results are presented. Correlation of regional contact area and grasp holding force is likely to provide insight into the provision of grip with an optimised holding force via the manipulation of contact area.
Buma, D G; Veltink, P H
Effect of Intermittent Stimulation Patterns on The Sensation During Electrocutaneous Stimulation Inproceedings
In: Triolo, R J (Ed.): pp. 069, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_069,
title = {Effect of Intermittent Stimulation Patterns on The Sensation During Electrocutaneous Stimulation},
author = {D G Buma and P H Veltink},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_069_Buma.pdf},
year = {2001},
date = {2001-07-01},
pages = {069},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {For electrotactile displays to become useful for supplementary sensory feedback for transfemoral prosthesis users the interface needs to be optimized. A closer look is taken at the nature of adaptation during electrocutaneous stimulation. In this portion the effect of intermittent stimulation patterns on the sensation is investigated. Seven different intermittent stimulation signals and two continuous signals were applied to the subjects skin in random order. Each of the nine trials lasted for about fifteen minutes and during these trials the stimulation current was adjusted at 80% of the dynamic range, as recommended in a previous study. The Visual Analog Scale was used to record the course of sensation during the period of stimulation. Results suggest two things. One, a minimal stimulation time (Ton) of 0.5 seconds is required to reach a maximal sensation. Two, a minimal rest period of about 0.3 seconds is required in order to postpone the occurrence of full adaptation (Toff).},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
For electrotactile displays to become useful for supplementary sensory feedback for transfemoral prosthesis users the interface needs to be optimized. A closer look is taken at the nature of adaptation during electrocutaneous stimulation. In this portion the effect of intermittent stimulation patterns on the sensation is investigated. Seven different intermittent stimulation signals and two continuous signals were applied to the subjects skin in random order. Each of the nine trials lasted for about fifteen minutes and during these trials the stimulation current was adjusted at 80% of the dynamic range, as recommended in a previous study. The Visual Analog Scale was used to record the course of sensation during the period of stimulation. Results suggest two things. One, a minimal stimulation time (Ton) of 0.5 seconds is required to reach a maximal sensation. Two, a minimal rest period of about 0.3 seconds is required in order to postpone the occurrence of full adaptation (Toff).
Buma, D G; Veltink, P H
Effect of Stimulation Level on Sensation During Continuous Electrocutaneous Stimulation Inproceedings
In: Triolo, R J (Ed.): pp. 068, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_068,
title = {Effect of Stimulation Level on Sensation During Continuous Electrocutaneous Stimulation},
author = {D G Buma and P H Veltink},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_068_Buma.pdf},
year = {2001},
date = {2001-07-01},
pages = {068},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {For electrotactile displays to become useful for supplementary sensory feedback for transfemoral prosthesis users the interface needs to be optimized. In the framework of this optimization the effect of different stimulation levels on the course of adaptation during fifteen minutes of continuous electrocutaneous stimulation was studied. Important parameters during this study were Sensation Threshold ST, Uncomfortable Threshold (UT) and Dynamic Range (DR). Whereby DR was defined as the difference between UT and ST. The level of sensation during the experiments was judged using a Visual Analog Scale. The stimulation levels were adjusted at three different levels respectively 20%, 50% and 80% of the DR. The course of adaptation was recorded three times for each level. The conclusion, which can be draw from the results, is that stimulating at 80% of the Dynamic Range (DR) is less prone to adaptation than stimulating at 20% and 50% of the DR.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
For electrotactile displays to become useful for supplementary sensory feedback for transfemoral prosthesis users the interface needs to be optimized. In the framework of this optimization the effect of different stimulation levels on the course of adaptation during fifteen minutes of continuous electrocutaneous stimulation was studied. Important parameters during this study were Sensation Threshold ST, Uncomfortable Threshold (UT) and Dynamic Range (DR). Whereby DR was defined as the difference between UT and ST. The level of sensation during the experiments was judged using a Visual Analog Scale. The stimulation levels were adjusted at three different levels respectively 20%, 50% and 80% of the DR. The course of adaptation was recorded three times for each level. The conclusion, which can be draw from the results, is that stimulating at 80% of the Dynamic Range (DR) is less prone to adaptation than stimulating at 20% and 50% of the DR.
Bijak, M; Mayr, W; Quittan, M; Sochor, A; Pacher, R; Unger, E; Rafolt, D; Lanmueller, H; Sauermann, S; Freilinger, G
Effects of NMES in Patients With Refractory Heart Failure Inproceedings
In: Triolo, R J (Ed.): pp. 053, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_053,
title = {Effects of NMES in Patients With Refractory Heart Failure},
author = {M Bijak and W Mayr and M Quittan and A Sochor and R Pacher and E Unger and D Rafolt and H Lanmueller and S Sauermann and G Freilinger},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_053_Bijak.pdf},
year = {2001},
date = {2001-07-01},
pages = {053},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Skeletal muscle strength and mass are severely impaired in patients with chronic heart failure. The aim of the study was to determine the impact of Neuromuscular Electrical Stimulation (NMES) on the thigh muscles of this group of patients. Forty-two subjects with stable disease course were assigned randomly to a stimulation group (SG, mean age: 59y) and a control group (CG, mean age: 57y). A modified version of a space approved eight-channel electrical stimulation device was used to exercise SG for eight weeks. Control parameters were isometric and isokinetic thigh muscle strength and muscle cross sectional area (CSA). An increase in muscle strength of 22.7% for knee extensors and 35.4% for knee flexors could be demonstrated in SG while CG remained unchanged or decreased by 8.4% in extensor strength. CSA increased in SG by 15.5% and in CG by 1.7%. NMES of thigh muscles in patients with refractory heart failure is effective in increasing muscle strength and bulk.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Skeletal muscle strength and mass are severely impaired in patients with chronic heart failure. The aim of the study was to determine the impact of Neuromuscular Electrical Stimulation (NMES) on the thigh muscles of this group of patients. Forty-two subjects with stable disease course were assigned randomly to a stimulation group (SG, mean age: 59y) and a control group (CG, mean age: 57y). A modified version of a space approved eight-channel electrical stimulation device was used to exercise SG for eight weeks. Control parameters were isometric and isokinetic thigh muscle strength and muscle cross sectional area (CSA). An increase in muscle strength of 22.7% for knee extensors and 35.4% for knee flexors could be demonstrated in SG while CG remained unchanged or decreased by 8.4% in extensor strength. CSA increased in SG by 15.5% and in CG by 1.7%. NMES of thigh muscles in patients with refractory heart failure is effective in increasing muscle strength and bulk.
Chen, S-C; Ho, Y-Z; Lai, C-H; Chen, C-J; Chiang, W-H; Chang, W H
Effects of Training With High and Low-Frequency Electrical Stimulation on Muscle Contractile Properties in Rabbits Inproceedings
In: Triolo, R J (Ed.): pp. 059, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_059,
title = {Effects of Training With High and Low-Frequency Electrical Stimulation on Muscle Contractile Properties in Rabbits},
author = {S-C Chen and Y-Z Ho and C-H Lai and C-J Chen and W-H Chiang and W H Chang},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_059_Chen.pdf},
year = {2001},
date = {2001-07-01},
pages = {059},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Controversy exists regarding the effects of different frequencies of ES on muscle contractile properties. The purpose of this study was to investigate the role of ES frequency on muscle contractile properties. Six male rabbits were divided into 2 groups (low and high-frequency ES training groups, stimulated by using 20 and 100 Hz respectively). They were trained by using surface ES on the gastrocnemius muscle 2 h daily, 5 days per week for 4 weeks. The twitch time to peak torque decreased in the high-frequency group and increased in the low-frequency group after ES training. The peak twitch torque, maximal tetanic contraction torque, and fatigue resistance all increased in both groups. According to the results, ES training with different frequencies may result in different effects on muscle phenotype transformation, whereas, increased muscle mass, muscle fiber density, new capillaries, and circulation might be effects of ES training common to different frequencies.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Controversy exists regarding the effects of different frequencies of ES on muscle contractile properties. The purpose of this study was to investigate the role of ES frequency on muscle contractile properties. Six male rabbits were divided into 2 groups (low and high-frequency ES training groups, stimulated by using 20 and 100 Hz respectively). They were trained by using surface ES on the gastrocnemius muscle 2 h daily, 5 days per week for 4 weeks. The twitch time to peak torque decreased in the high-frequency group and increased in the low-frequency group after ES training. The peak twitch torque, maximal tetanic contraction torque, and fatigue resistance all increased in both groups. According to the results, ES training with different frequencies may result in different effects on muscle phenotype transformation, whereas, increased muscle mass, muscle fiber density, new capillaries, and circulation might be effects of ES training common to different frequencies.
Rosselli, D P; Rosselli, F
The Electric Stimulation and the Isokinetic Exercise in the Hemiplegic Shoulder Inproceedings
In: Triolo, R J (Ed.): pp. 056, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_056,
title = {The Electric Stimulation and the Isokinetic Exercise in the Hemiplegic Shoulder},
author = {D P Rosselli and F Rosselli},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_056_Rosselli.pdf},
year = {2001},
date = {2001-07-01},
pages = {056},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {The possibility of the isokinetic exercise ,in synergic action with the electro stimulation in hemiplegic patients ,is the object of this study. The first target is the postural evaluation to prevent some articular conflict that can provoke the block of the shoulder, often irreversible most of the cases. The isokinetic systems allow this mobilitation according to the physiological principles: range of motion by the articular and muscular functional possibilities. The approach begins with a functional electric stimulation for approximately 5 hours every day; the stimulus provoke a rhythmic elevation and lowering of the shoulder; during this, we position the patient on a isokinetic system and proceed first to the execution of a passive shoulder intra - extra rotation exercise; then we begin with isokinetic test for evaluate how much and the times of the active exercise possibility reprise. This method ( in about 70-80% of the cases) has given unexpected results, expecially in the autonomous movements recovery.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
The possibility of the isokinetic exercise ,in synergic action with the electro stimulation in hemiplegic patients ,is the object of this study. The first target is the postural evaluation to prevent some articular conflict that can provoke the block of the shoulder, often irreversible most of the cases. The isokinetic systems allow this mobilitation according to the physiological principles: range of motion by the articular and muscular functional possibilities. The approach begins with a functional electric stimulation for approximately 5 hours every day; the stimulus provoke a rhythmic elevation and lowering of the shoulder; during this, we position the patient on a isokinetic system and proceed first to the execution of a passive shoulder intra - extra rotation exercise; then we begin with isokinetic test for evaluate how much and the times of the active exercise possibility reprise. This method ( in about 70-80% of the cases) has given unexpected results, expecially in the autonomous movements recovery.
Zealear, D L; Rodriquez, R J; Billante, M; Stirnemann, J; Billante, C R
Electrical Stimulation of a Denervated Muscle Promotes Selective Reinnervation Inproceedings
In: Triolo, R J (Ed.): pp. 062, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_062,
title = {Electrical Stimulation of a Denervated Muscle Promotes Selective Reinnervation},
author = {D L Zealear and R J Rodriquez and M Billante and J Stirnemann and C R Billante},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_062_Zealear.pdf},
year = {2001},
date = {2001-07-01},
pages = {062},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {The effect of electrical stimulation of the denervated posterior cricoarytenoid (PCA) muscle on its subsequent reinnervation was explored in the canine. Eight animals were implanted with planar electrode arrays for chronic stimulation and EMG recording across this fan-shaped muscle surface. Four animals were continuously stimulated for the duration of the 12 month experiment; the remaining four served as nonstimulated controls. Quantitative techniques were developed to determine the extent of appropriate reinnervation by intrinsic motoneurons and inappropriate reinnervation by antagonist motoneurons. All four experimental animals showed a greater level of correct and a lesser level of incorrect reinnervation than the controls, on both electromyographic and behavioral grounds. Thus, electrical stimulation improved the quality of muscle reconnection by suppressing incorrect and enhancing correct reinnervation. Stimulation also enhanced the overall magnitude of reinnervation but this effect was less robust.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
The effect of electrical stimulation of the denervated posterior cricoarytenoid (PCA) muscle on its subsequent reinnervation was explored in the canine. Eight animals were implanted with planar electrode arrays for chronic stimulation and EMG recording across this fan-shaped muscle surface. Four animals were continuously stimulated for the duration of the 12 month experiment; the remaining four served as nonstimulated controls. Quantitative techniques were developed to determine the extent of appropriate reinnervation by intrinsic motoneurons and inappropriate reinnervation by antagonist motoneurons. All four experimental animals showed a greater level of correct and a lesser level of incorrect reinnervation than the controls, on both electromyographic and behavioral grounds. Thus, electrical stimulation improved the quality of muscle reconnection by suppressing incorrect and enhancing correct reinnervation. Stimulation also enhanced the overall magnitude of reinnervation but this effect was less robust.
Sato, M; Shimada, Y; Sato, K; Matsunaga, T; Ando, S; Minato, T; Chida, S; Hatakeyama, K; Iizuka, K
In: Triolo, R J (Ed.): pp. 057, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_057,
title = {Energy Consumption and Physiological Reactions of Treadmill Walking with Functional Electrical Stimulation Using Original Primewalk and Modified Primewalk in Paraplegia},
author = {M Sato and Y Shimada and K Sato and T Matsunaga and S Ando and T Minato and S Chida and K Hatakeyama and K Iizuka},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_057_Sato.pdf},
year = {2001},
date = {2001-07-01},
pages = {057},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {The Primewalk is a slide type of medial single hip joint originally designed by Saitoh, and later modified to add hip internal rotation devices. The purpose of this study is to evaluate the influence on the cardiopulmonary system of paraplegic walking by means of FES while using the original Primewalk and the modified Primewalk. The subject was a 22-year-old male with T12 complete paraplegia who walked on a treadmill using FES with both Primewalks. The walking speed was 1 km/h (equivalent to a comfortable walking speed) and the walking time was 4 minutes. During the walking trial, oxidative energy consumption, step cadence, physiological cost index and blood pressure were measured. There were no significant differences found between the original Primewalk and the modified Primewalk when comparing all parameters. The modified Primewalk was useful for restoring paraplegic walking without any serious cardiopulmonary.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
The Primewalk is a slide type of medial single hip joint originally designed by Saitoh, and later modified to add hip internal rotation devices. The purpose of this study is to evaluate the influence on the cardiopulmonary system of paraplegic walking by means of FES while using the original Primewalk and the modified Primewalk. The subject was a 22-year-old male with T12 complete paraplegia who walked on a treadmill using FES with both Primewalks. The walking speed was 1 km/h (equivalent to a comfortable walking speed) and the walking time was 4 minutes. During the walking trial, oxidative energy consumption, step cadence, physiological cost index and blood pressure were measured. There were no significant differences found between the original Primewalk and the modified Primewalk when comparing all parameters. The modified Primewalk was useful for restoring paraplegic walking without any serious cardiopulmonary.
Simmons, A D; Montgomery, E B; Grill, W M
Excitation Characteristics of Paresthesias Produced by Deep Brain Stimulation Inproceedings
In: Triolo, R J (Ed.): pp. 071, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_071,
title = {Excitation Characteristics of Paresthesias Produced by Deep Brain Stimulation},
author = {A D Simmons and E B Montgomery and W M Grill},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_071_Simmons.pdf},
year = {2001},
date = {2001-07-01},
pages = {071},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Chronic deep brain stimulation (DBS) is effective in treating a number of neurological disorders, but the mechanisms of action are unclear. Current hypotheses are difficult to evaluate because it is not known which neural elements are affected by stimulation. During electrode implantation for DBS therapy, neural recordings are conducted to determine the receptive fields of local neurons. During test stimulation of the thalamus, patients may experience paresthesias either in the local receptive field (concordant paresthesias) or in a different area of the body (discordant paresthesias). We hypothesized that concordant paresthesias are caused by the stimulation of neural cell bodies while discordant paresthesias are due to the stimulation of axons of passage. Strength-duration properties of paresthesias were measured to differentiate stimulation of local cells or axons of passage. No significant differences were found between the chronaxie times of concordant and discordant paresthesias, suggesting that both are evoked by axonal stimulation.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Chronic deep brain stimulation (DBS) is effective in treating a number of neurological disorders, but the mechanisms of action are unclear. Current hypotheses are difficult to evaluate because it is not known which neural elements are affected by stimulation. During electrode implantation for DBS therapy, neural recordings are conducted to determine the receptive fields of local neurons. During test stimulation of the thalamus, patients may experience paresthesias either in the local receptive field (concordant paresthesias) or in a different area of the body (discordant paresthesias). We hypothesized that concordant paresthesias are caused by the stimulation of neural cell bodies while discordant paresthesias are due to the stimulation of axons of passage. Strength-duration properties of paresthesias were measured to differentiate stimulation of local cells or axons of passage. No significant differences were found between the chronaxie times of concordant and discordant paresthesias, suggesting that both are evoked by axonal stimulation.
Tarler, M D; Mortimer, J T
Facilitative and Refractory Periods Measured for the Cat Sciatic Nerve from a Nerve Cuff Electrode Inproceedings
In: Triolo, R J (Ed.): pp. 075, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_075,
title = {Facilitative and Refractory Periods Measured for the Cat Sciatic Nerve from a Nerve Cuff Electrode},
author = {M D Tarler and J T Mortimer},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_075_Tarler.pdf},
year = {2001},
date = {2001-07-01},
pages = {075},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {The duration of the facilitative and the refractory periods for the cat sciatic nerve were found to be 700 and 900msec, respectively. These values were based on the length of the facilitative and refractory periods found in 33 cases across five animals using monopolar, four-contact nerve cuff electrodes. Based on these results, the linear summation of two different stimulation configurations within the same nerve cuff electrode can be tested. The ability to produce the linear summation of two different stimulation configurations will support the hypothesis that a single self-sizing spiral cuff with multiple contacts and a single lead may be used in place of several muscle-based electrodes each with its own separate lead.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
The duration of the facilitative and the refractory periods for the cat sciatic nerve were found to be 700 and 900msec, respectively. These values were based on the length of the facilitative and refractory periods found in 33 cases across five animals using monopolar, four-contact nerve cuff electrodes. Based on these results, the linear summation of two different stimulation configurations within the same nerve cuff electrode can be tested. The ability to produce the linear summation of two different stimulation configurations will support the hypothesis that a single self-sizing spiral cuff with multiple contacts and a single lead may be used in place of several muscle-based electrodes each with its own separate lead.
Daly, J J; Ruff, R L; Debogorski, A A; Strasshofer, B C; Marsolais, E B; Kollar, K
FNS for Gait Component Restoration Post Stroke Inproceedings
In: Triolo, R J (Ed.): pp. 054, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_054,
title = {FNS for Gait Component Restoration Post Stroke},
author = {J J Daly and R L Ruff and A A Debogorski and B C Strasshofer and E B Marsolais and K Kollar},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_054_Daly.pdf},
year = {2001},
date = {2001-07-01},
pages = {054},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Purpose. A multi-channel functional neuromuscular stimulation (FNS) system using intramuscular (IM) electrodes (FNS-IM) and an externally worn stimulator were tested for suitability in patients with stroke; feasibility in acute stroke; and efficacy in restoration of gait in chronic stroke. Methods. First, mechanical and physiological performance and subject response were quantified for 124 electrodes in 17 subjects. Second, we tested a seven-channel system for acute stroke (3 weeks to 3 months from stroke onset). Third, we studied the efficacy of FNS-IM for gait restoration for chronic stroke. Outcome measures included impairment, disability, and function. Results. There were 1,413.8 total electrode-months of use, free of mechanical failure. There was a 99.6% chance of electrode survival at 21 months and no infections. FNS-IM proved feasible for subjects with acute stroke, who improved in pre-/post-treatment measures (p = .014). After FNS-IM treatment, subjects with chronic stroke demonstrated gains in strength, coordination, and gait components beyond those achieved following surface stimulation (p < .05). Conclusion. These results justify further studies of this technology for stroke gait training.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Purpose. A multi-channel functional neuromuscular stimulation (FNS) system using intramuscular (IM) electrodes (FNS-IM) and an externally worn stimulator were tested for suitability in patients with stroke; feasibility in acute stroke; and efficacy in restoration of gait in chronic stroke. Methods. First, mechanical and physiological performance and subject response were quantified for 124 electrodes in 17 subjects. Second, we tested a seven-channel system for acute stroke (3 weeks to 3 months from stroke onset). Third, we studied the efficacy of FNS-IM for gait restoration for chronic stroke. Outcome measures included impairment, disability, and function. Results. There were 1,413.8 total electrode-months of use, free of mechanical failure. There was a 99.6% chance of electrode survival at 21 months and no infections. FNS-IM proved feasible for subjects with acute stroke, who improved in pre-/post-treatment measures (p = .014). After FNS-IM treatment, subjects with chronic stroke demonstrated gains in strength, coordination, and gait components beyond those achieved following surface stimulation (p < .05). Conclusion. These results justify further studies of this technology for stroke gait training.
Faghri, D; Yount, J P; Pesce, W J; Seetharama, S
In: Triolo, R J (Ed.): pp. 050, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_050,
title = {Functional Electrical Stimulation vs. Voluntary Muscle Contraction: A Comparison Between Able-Bodied and People with Spinal Cord Injury},
author = {D Faghri and J P Yount and W J Pesce and S Seetharama},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_050_Faghri.pdf},
year = {2001},
date = {2001-07-01},
pages = {050},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Fourteen Spinal Cord Injured (SCI) and 15 Able-bodied (AB) individuals participated in two 30 minutes (min) standing sessions. The control groups (SCICONT, ABCONT) consisted of both AB and SCI standing still with no muscle contraction. The experimental groups consisted of both SCI subjects (SCIEXP) standing with use of Functional Electrical Stimulation (FES)-induced muscle activation of four lower limb muscle groups and AB subjects (ABEXP) standing while performing tiptoe exercises for 30 min. A computerized impedance cardiograph was used to measure the changes of heart rate (HR), stroke volume (SV), cardiac output (CO), systolic, diastolic and mean arterial blood pressure (SBP, DBP, MAP) and total peripheral resistance (TPR) during sitting, and at 0, 5 and 30 min of standing. Change in position from sitting to standing caused significant drop in SBP, DBP, and MAP during SCICONT, while these values were maintained during SCIEXP. There were no significant changes in AB subjects in BP values. During SCIEXP standing, SCI maintained their hemodynamics at pre standing values at 5 min and 30-min post standing. These values decreased significantly during SCICONT, while TPR increased. The Able-bodied (AB) responded during ABCONT by a significant drop in SV and CO while TPR only increased at 30 min of standing. It was concluded that FES has equal or even better effect on improving blood circulation during standing than voluntary activation of the physiologic muscle pump and may be used to improve tolerance to tilting and standing in SCI.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Fourteen Spinal Cord Injured (SCI) and 15 Able-bodied (AB) individuals participated in two 30 minutes (min) standing sessions. The control groups (SCICONT, ABCONT) consisted of both AB and SCI standing still with no muscle contraction. The experimental groups consisted of both SCI subjects (SCIEXP) standing with use of Functional Electrical Stimulation (FES)-induced muscle activation of four lower limb muscle groups and AB subjects (ABEXP) standing while performing tiptoe exercises for 30 min. A computerized impedance cardiograph was used to measure the changes of heart rate (HR), stroke volume (SV), cardiac output (CO), systolic, diastolic and mean arterial blood pressure (SBP, DBP, MAP) and total peripheral resistance (TPR) during sitting, and at 0, 5 and 30 min of standing. Change in position from sitting to standing caused significant drop in SBP, DBP, and MAP during SCICONT, while these values were maintained during SCIEXP. There were no significant changes in AB subjects in BP values. During SCIEXP standing, SCI maintained their hemodynamics at pre standing values at 5 min and 30-min post standing. These values decreased significantly during SCICONT, while TPR increased. The Able-bodied (AB) responded during ABCONT by a significant drop in SV and CO while TPR only increased at 30 min of standing. It was concluded that FES has equal or even better effect on improving blood circulation during standing than voluntary activation of the physiologic muscle pump and may be used to improve tolerance to tilting and standing in SCI.
Coiro, D; Smith, B; Betz, R
In: Triolo, R J (Ed.): pp. 049, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_049,
title = {Gait Event Detection Using Intramuscular Electromyography to Trigger Functional Electrical Stimulation in the Child with Cerebral Palsy},
author = {D Coiro and B Smith and R Betz},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_049_Coiro.pdf},
year = {2001},
date = {2001-07-01},
pages = {049},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Under investigation is whether intramuscular (IM) electromyography can be used to trigger functional electrical stimulation (FES) to improve ambulation for the child with cerebral palsy (CP). In this study, bifilar percutaneous intramuscular (IM) recording electrodes were implanted bilaterally into a quadriceps muscle of a child with CP. Following implantation, 5 walking trials consisting of 2-4 steps were conducted during which gait events and IM EMG data were collected simultaneously. Based on the data from the first trial, a fuzzy inference system (FIS) was developed to determine 5 gait events for one leg from the 2 IM EMG signals and their derivatives. The FIS was evaluated using the remaining 4 trials. For 4 of 5 gait events detected, the average error between the actual and predicted events was 3% of the gait cycle or less suggesting that it may be feasible to accurately detect gait events using IM EMG signals.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Under investigation is whether intramuscular (IM) electromyography can be used to trigger functional electrical stimulation (FES) to improve ambulation for the child with cerebral palsy (CP). In this study, bifilar percutaneous intramuscular (IM) recording electrodes were implanted bilaterally into a quadriceps muscle of a child with CP. Following implantation, 5 walking trials consisting of 2-4 steps were conducted during which gait events and IM EMG data were collected simultaneously. Based on the data from the first trial, a fuzzy inference system (FIS) was developed to determine 5 gait events for one leg from the 2 IM EMG signals and their derivatives. The FIS was evaluated using the remaining 4 trials. For 4 of 5 gait events detected, the average error between the actual and predicted events was 3% of the gait cycle or less suggesting that it may be feasible to accurately detect gait events using IM EMG signals.
Inmann, A; Haugland, M
Improvement of the Catch Reaction of a Closed-Loop FES Hand Grasp Neuroprosthesis Inproceedings
In: Triolo, R J (Ed.): pp. 060, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_060,
title = {Improvement of the Catch Reaction of a Closed-Loop FES Hand Grasp Neuroprosthesis},
author = {A Inmann and M Haugland},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_060_Inmann.pdf},
year = {2001},
date = {2001-07-01},
pages = {060},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Functional electrical stimulation of paralyzed hands can provide tetraplegic individuals with basic hand function. To improve the control of the electrically stimulated hand muscles we used signals from natural cutaneous sensors recorded with a nerve cuff electrode implanted around the palmar digital nerve innervating the index finger. Events on the skin, such as changes in contact force, skin stretch, and slips across the skin, could be detected in the nerve signal and were used as feedback information for the stimulation system. A method is presented for improving the system reaction when such events on the skin occur. The proposed method used one to three pulses with maximum pulse width applied with twice the instantaneous stimulation frequency. The results suggest that using one maximum pulse provides the best system reaction with minimum stimulation effort.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Functional electrical stimulation of paralyzed hands can provide tetraplegic individuals with basic hand function. To improve the control of the electrically stimulated hand muscles we used signals from natural cutaneous sensors recorded with a nerve cuff electrode implanted around the palmar digital nerve innervating the index finger. Events on the skin, such as changes in contact force, skin stretch, and slips across the skin, could be detected in the nerve signal and were used as feedback information for the stimulation system. A method is presented for improving the system reaction when such events on the skin occur. The proposed method used one to three pulses with maximum pulse width applied with twice the instantaneous stimulation frequency. The results suggest that using one maximum pulse provides the best system reaction with minimum stimulation effort.
Bogie, K M; Triolo, R J; Chae, J
Improving the Health of Paralyzed Tissue Using Electrical Stimulation Inproceedings
In: Triolo, R J (Ed.): pp. 058, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_058,
title = {Improving the Health of Paralyzed Tissue Using Electrical Stimulation},
author = {K M Bogie and R J Triolo and J Chae},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_058_Bogie.pdf},
year = {2001},
date = {2001-07-01},
pages = {058},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Individuals with spinal cord injury (SCI) experience many physiological changes below the level of the lesion. Many of these changes contribute to an overall degeneration in tissue health which increases the risk of tissue breakdown and pressure sore development. Electrical stimulation using advanced implanted technologies provides a unique pathway for improving the health of paralyzed tissue by altering intrinsic characteristics. Subjects utilizing an implanted stimulation system for standing and transfers have been monitored to determine changes in tissue health status due to long-term use of neuromuscular electrical stimulation (NMES). Regional tissue blood flow has been monitored concurrently with assessment of interface pressures at the subject/support interface when seated in the wheelchair. To date repeated assessments have been carried out on 7 subjects. Preliminary findings support the hypothesis that long-term use of NMES can improve the health of paralyzed gluteal muscle, thus reducing the risk of ischial pressure sore development.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Individuals with spinal cord injury (SCI) experience many physiological changes below the level of the lesion. Many of these changes contribute to an overall degeneration in tissue health which increases the risk of tissue breakdown and pressure sore development. Electrical stimulation using advanced implanted technologies provides a unique pathway for improving the health of paralyzed tissue by altering intrinsic characteristics. Subjects utilizing an implanted stimulation system for standing and transfers have been monitored to determine changes in tissue health status due to long-term use of neuromuscular electrical stimulation (NMES). Regional tissue blood flow has been monitored concurrently with assessment of interface pressures at the subject/support interface when seated in the wheelchair. To date repeated assessments have been carried out on 7 subjects. Preliminary findings support the hypothesis that long-term use of NMES can improve the health of paralyzed gluteal muscle, thus reducing the risk of ischial pressure sore development.
McIntyre, C C; Grill, W M
Model-Based Design of Stimulus Trains to Increase Selectivity in CNS Microstimulation Inproceedings
In: Triolo, R J (Ed.): pp. 066, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_066,
title = {Model-Based Design of Stimulus Trains to Increase Selectivity in CNS Microstimulation},
author = {C C McIntyre and W M Grill},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_066_Mcintyre.pdf},
year = {2001},
date = {2001-07-01},
pages = {066},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {The goal of this project was to design stimulus trains that would enhance selectivity between microstimulation of cells and axons in the central nervous system (CNS). Detailed computer-based models of CNS cells and axons were developed that accurately reproduced the dynamic firing properties of mammalian neurons. The results demonstrate that alterations in the stimulus frequency, based on differences in the post-action-potential recovery cycles of cells and axons, enabled differential activation of cells or axons equidistant from the electrode. This provides a useful tool for selective stimulation of the CNS and provides a basis for understand frequency-dependent outputs during CNS stimulation.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
The goal of this project was to design stimulus trains that would enhance selectivity between microstimulation of cells and axons in the central nervous system (CNS). Detailed computer-based models of CNS cells and axons were developed that accurately reproduced the dynamic firing properties of mammalian neurons. The results demonstrate that alterations in the stimulus frequency, based on differences in the post-action-potential recovery cycles of cells and axons, enabled differential activation of cells or axons equidistant from the electrode. This provides a useful tool for selective stimulation of the CNS and provides a basis for understand frequency-dependent outputs during CNS stimulation.
Uranga, A; Rijkhoff, N J M
A Modified Pulseshape for Selective Stimulation Using Anodal Block Inproceedings
In: Triolo, R J (Ed.): pp. 076, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_076,
title = {A Modified Pulseshape for Selective Stimulation Using Anodal Block},
author = {A Uranga and N J M Rijkhoff},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_076_Uranga.pdf},
year = {2001},
date = {2001-07-01},
pages = {076},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {The main aim of this work is the study of different pulseshapes for selective small fiber diameter activation in order to minimize charge injection when using the anodal block technique.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
The main aim of this work is the study of different pulseshapes for selective small fiber diameter activation in order to minimize charge injection when using the anodal block technique.
Giuffrida, J P; Crago, P E
Natural Control of Triceps Stimulation Using FES Inproceedings
In: Triolo, R J (Ed.): pp. 064, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_064,
title = {Natural Control of Triceps Stimulation Using FES},
author = {J P Giuffrida and P E Crago},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_064_Giuffrida.pdf},
year = {2001},
date = {2001-07-01},
pages = {064},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Individuals with C5/C6 spinal cord injury have paralyzed elbow extensors, yet retain weak to strong voluntary control of elbow flexion and shoulder function. Previous studies have shown that functional electrical stimulation (FES) of the triceps provides sufficient elbow extension strength and control to greatly improve function. With triceps stimulation applied at a constant level, elbow angle is controlled naturally by voluntary flexion opposing the stimulated extension. An alternative is a reciprocal control scheme employing biceps EMG to modulate triceps stimulation. With reciprocal control, increasing biceps EMG proportionally reduces triceps stimulation. A PC based lab system was designed to test the feasibility of reciprocal control. Reciprocal control increased the range of elbow moments, was stable during maintained elbow angle or isometric moment, and used less stimulation. Reciprocal control of triceps stimulation using biceps EMG is an effective method for restoring elbow extension to C5/C6 spinal cord injury patients.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Individuals with C5/C6 spinal cord injury have paralyzed elbow extensors, yet retain weak to strong voluntary control of elbow flexion and shoulder function. Previous studies have shown that functional electrical stimulation (FES) of the triceps provides sufficient elbow extension strength and control to greatly improve function. With triceps stimulation applied at a constant level, elbow angle is controlled naturally by voluntary flexion opposing the stimulated extension. An alternative is a reciprocal control scheme employing biceps EMG to modulate triceps stimulation. With reciprocal control, increasing biceps EMG proportionally reduces triceps stimulation. A PC based lab system was designed to test the feasibility of reciprocal control. Reciprocal control increased the range of elbow moments, was stable during maintained elbow angle or isometric moment, and used less stimulation. Reciprocal control of triceps stimulation using biceps EMG is an effective method for restoring elbow extension to C5/C6 spinal cord injury patients.
Keller, T; Popovic, M R
Real-Time Stimulation Artifact Removal in EMG Signals for Neuroprosthesis Control Applications Inproceedings
In: Triolo, R J (Ed.): pp. 073, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_073,
title = {Real-Time Stimulation Artifact Removal in EMG Signals for Neuroprosthesis Control Applications},
author = {T Keller and M R Popovic},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_073_Keller.pdf},
year = {2001},
date = {2001-07-01},
pages = {073},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {An elegant and intuitive method to control a neuroprosthesis is to use S(urface)EMG activity of voluntary controllable muscles [1]. Since in such applications the voluntary SEMG activity is contaminated with much higher stimulation artifacts (SA) than the SEMG signal, the artifact somehow has to be eliminated. Well established SA removal techniques are artifact blanking or filtering methods. Real-time SA blanking methods, either hardware samplehold circuits or digital blanking routines loose all EMG information during the blanking period that lasts several milliseconds. SA filtering techniques are not practical with constant current stimulators since the long lasting SA tail overlaps in frequency and time domain with the voluntary SEMG. A new method that makes use of the randomness and stationarity of voluntary EMG is presented. An ensemble averaged SA with exponential forgetting was subtracted from the recorded SEMG and an almost artifact free SEMG signal was obtained. Fast convergence of the algorithm and good quality residual SEMG were shown, while the realtime computational power requirements were very low.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
An elegant and intuitive method to control a neuroprosthesis is to use S(urface)EMG activity of voluntary controllable muscles [1]. Since in such applications the voluntary SEMG activity is contaminated with much higher stimulation artifacts (SA) than the SEMG signal, the artifact somehow has to be eliminated. Well established SA removal techniques are artifact blanking or filtering methods. Real-time SA blanking methods, either hardware samplehold circuits or digital blanking routines loose all EMG information during the blanking period that lasts several milliseconds. SA filtering techniques are not practical with constant current stimulators since the long lasting SA tail overlaps in frequency and time domain with the voluntary SEMG. A new method that makes use of the randomness and stationarity of voluntary EMG is presented. An ensemble averaged SA with exponential forgetting was subtracted from the recorded SEMG and an almost artifact free SEMG signal was obtained. Fast convergence of the algorithm and good quality residual SEMG were shown, while the realtime computational power requirements were very low.
Heasman, J M; Scott, T R D; Flynn, R Y; Vare, V A; Gschwind, C R
Relationship of M-wave Time Scale Variation with Motor Unit Recruitment Evaluated Using the Matched Wavelet Transform Inproceedings
In: Triolo, R J (Ed.): pp. 074, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_074,
title = {Relationship of M-wave Time Scale Variation with Motor Unit Recruitment Evaluated Using the Matched Wavelet Transform},
author = {J M Heasman and T R D Scott and R Y Flynn and V A Vare and C R Gschwind},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_074_Heasman.pdf},
year = {2001},
date = {2001-07-01},
pages = {074},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {The matched wavelet transform (MWT) was used to quantify time scale variation in M-waves evoked during motor unit (MU) recruitment. Surface M-wave activity was detected from four non-fatigued paralysed hand muscles of persons with spinal cord injuries in the C5 to C6 region. Electrical stimulation was applied using implanted epimysial electrodes. Results indicated significant time scaling of the M-wave occurred during progressive MU recruitment in all the muscles studied.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
The matched wavelet transform (MWT) was used to quantify time scale variation in M-waves evoked during motor unit (MU) recruitment. Surface M-wave activity was detected from four non-fatigued paralysed hand muscles of persons with spinal cord injuries in the C5 to C6 region. Electrical stimulation was applied using implanted epimysial electrodes. Results indicated significant time scaling of the M-wave occurred during progressive MU recruitment in all the muscles studied.
Vecchi, F; Micera, S; Zaccone, F; Carrozza, M C; Sabatini, A M; Dario, P
A Sensorized Glove For Applications in Biomechanics and Motor Control Inproceedings
In: Triolo, R J (Ed.): pp. 067, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_067,
title = {A Sensorized Glove For Applications in Biomechanics and Motor Control},
author = {F Vecchi and S Micera and F Zaccone and M C Carrozza and A M Sabatini and P Dario},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_067_Vecchi.pdf},
year = {2001},
date = {2001-07-01},
pages = {067},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {In this paper a sensorized glove for applications in biomechanics and motor control is presented. This system was equipped with 20 Hall-effect sensors and 8 piezoresistive sensors to obtain information about the grasp status during activities of daily living. It was used in experiments simulating different grip types to verify the feasibility of the approach proposed and to define the optimal location of the force sensors. The results showed that the glove can furnish important information about grasp status. Moreover, the sensor located on the distal part of the thumb seems to be the most useful.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
In this paper a sensorized glove for applications in biomechanics and motor control is presented. This system was equipped with 20 Hall-effect sensors and 8 piezoresistive sensors to obtain information about the grasp status during activities of daily living. It was used in experiments simulating different grip types to verify the feasibility of the approach proposed and to define the optimal location of the force sensors. The results showed that the glove can furnish important information about grasp status. Moreover, the sensor located on the distal part of the thumb seems to be the most useful.
Cikajlo, I; Bajd, T
The Use of Artificial Sensors in FES Gait Re-education System Inproceedings
In: Triolo, R J (Ed.): pp. 048, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_048,
title = {The Use of Artificial Sensors in FES Gait Re-education System},
author = {I Cikajlo and T Bajd},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_048_Cikajlo.pdf},
year = {2001},
date = {2001-07-01},
pages = {048},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {In the paper the sensory system for a FES gait re-education system is proposed. The gait training orthosis for incomplete spinal cord injured patients is being developed. Sensory feedback and walking phase detection are the most important parts of the orthosis. Implementation of several types of sensors into the rehabilitative system can make it more reliable. Four accelerometers, gyroscope and two goniometers were used in the measurement system. Data collected by the sensors were input into mathematical algorithms. As a reference measurement device an optical position measurement system was used. The data collected were analyzed offline in order to develop a suitable walking phase detection. In order to choose the appropriate sensors, the assessments were performed in three healthy subjects. The results have shown a need and advantages of the multisensor use. The appropriate feedback signal will be delivered to the patient who will voluntarily control the functional electrical stimulation.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
In the paper the sensory system for a FES gait re-education system is proposed. The gait training orthosis for incomplete spinal cord injured patients is being developed. Sensory feedback and walking phase detection are the most important parts of the orthosis. Implementation of several types of sensors into the rehabilitative system can make it more reliable. Four accelerometers, gyroscope and two goniometers were used in the measurement system. Data collected by the sensors were input into mathematical algorithms. As a reference measurement device an optical position measurement system was used. The data collected were analyzed offline in order to develop a suitable walking phase detection. In order to choose the appropriate sensors, the assessments were performed in three healthy subjects. The results have shown a need and advantages of the multisensor use. The appropriate feedback signal will be delivered to the patient who will voluntarily control the functional electrical stimulation.
de, KroonJ. R.; IJzerman, M J; derLee van,; Lankhorst, G J
In: Triolo, R J (Ed.): pp. 055, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_055,
title = {The Use of Electrical Stimulation to Improve Motor Control and Function of the Upper Extremity After Stroke: A Systematic Review},
author = {KroonJ.R. de and M J IJzerman and derLee van and G J Lankhorst},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_055_deKroon.pdf},
year = {2001},
date = {2001-07-01},
pages = {055},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {Electrical stimulation is one of the strategies used to treat the affected arm in stroke patients. The objective of this systematic review is to summarize the available evidence on the effect of electrical stimulation in improving motor control and arm function thus far. A systematic literature search yielded seven randomized clinical trials. The methodological scores ranged from 7 to 16 (out of 19). Different methods of stimulation were applied to heterogeneous patient groups. All studies reported a statistically significant effect of electrical stimulation on motor control. Only two studies assessed the effect on arm function, one reports a positive effect. No relation between effect and patient characteristics, method of stimulation and/or methodological quality could be detected. In conclusion this review suggest a positive effect of electrical stimulation on motor function. No conclusion can be drawn with respect to arm function.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
Electrical stimulation is one of the strategies used to treat the affected arm in stroke patients. The objective of this systematic review is to summarize the available evidence on the effect of electrical stimulation in improving motor control and arm function thus far. A systematic literature search yielded seven randomized clinical trials. The methodological scores ranged from 7 to 16 (out of 19). Different methods of stimulation were applied to heterogeneous patient groups. All studies reported a statistically significant effect of electrical stimulation on motor control. Only two studies assessed the effect on arm function, one reports a positive effect. No relation between effect and patient characteristics, method of stimulation and/or methodological quality could be detected. In conclusion this review suggest a positive effect of electrical stimulation on motor function. No conclusion can be drawn with respect to arm function.
Fuhr, T; Godais, A; Schmidt, G
A Vibrotactile Sensory Substitution System for Use with Gait Neuroprosthesis Inproceedings
In: Triolo, R J (Ed.): pp. 070, IFESS_2001, Cleveland, Ohio, 2001.
Abstract | Links | BibTeX | Tags: Human Performance & User Interfaces
@inproceedings{IFESS2001_070,
title = {A Vibrotactile Sensory Substitution System for Use with Gait Neuroprosthesis},
author = {T Fuhr and A Godais and G Schmidt},
editor = {R J Triolo},
url = {https://ifess.org/files/proceedings/IFESS2001/IFESS2001_070_Fuhr.pdf},
year = {2001},
date = {2001-07-01},
pages = {070},
publisher = {IFESS_2001},
address = {Cleveland, Ohio},
abstract = {In this paper the design of a sensory substitution system and first experimental experience with paraplegic subjects using the system to display foot load during FES-assisted walking is presented. Miniature vibration motors are used as tactile displays and integrated in an elastic shirt. Intermittent vibration is used to encode three foot load states (unloaded, floor contact, loaded) measured by insole pressure sensors. Alternatively, arbitrary sensor signals can serve as information source. Preferred vibration mode and display position have been determined in experiments with 4 paraplegic and 10 neurologically intact subjects, the sensory substitution system has been tested in 3 paraplegic subjects during FES-assisted gait.},
keywords = {Human Performance & User Interfaces},
pubstate = {published},
tppubtype = {inproceedings}
}
In this paper the design of a sensory substitution system and first experimental experience with paraplegic subjects using the system to display foot load during FES-assisted walking is presented. Miniature vibration motors are used as tactile displays and integrated in an elastic shirt. Intermittent vibration is used to encode three foot load states (unloaded, floor contact, loaded) measured by insole pressure sensors. Alternatively, arbitrary sensor signals can serve as information source. Preferred vibration mode and display position have been determined in experiments with 4 paraplegic and 10 neurologically intact subjects, the sensory substitution system has been tested in 3 paraplegic subjects during FES-assisted gait.