2008
Kobravi, H-R; Erfanian, A
Adaptive Neuro-Sliding Mode Control of Ankle Movement Using Electrical Stimulation of Agonist-Antagonist Muscles Inproceedings
In: Editor_Unkown_2008, (Ed.): pp. 048, IFESS_2008, Freiburg Concert Hall, Freiburg, Germany, 2008, ISBN: ISBN_Unkown_2008.
Abstract | Links | BibTeX | Tags: Modelling & Control, Neuromodulation
@inproceedings{IFESS2008_048,
title = {Adaptive Neuro-Sliding Mode Control of Ankle Movement Using Electrical Stimulation of Agonist-Antagonist Muscles},
author = {H-R Kobravi and A Erfanian},
editor = {Editor_Unkown_2008},
url = {https://ifess.org/files/proceedings/IFESS2008/IFESS2008_048_Kobravi.pdf},
isbn = {ISBN_Unkown_2008},
year = {2008},
date = {2008-09-01},
pages = {048},
publisher = {IFESS_2008},
address = {Freiburg Concert Hall, Freiburg, Germany},
abstract = {This paper presents a robust control strategy which is based on synergistic combination of a neural controller with sliding mode control (SMC) for online control of ankle movement using functional electrical stimulation (FES) of dorsiflexor and plantar flexor muscles in paraplegic subjects. We will refer to this method as neuro- SMC. The results indicate that neuro-SMC control can automatically determines the level of coactivation during tracking the desired ankle-joint angle. It is observed that at the low levels of activation, both muscles were engaged. The activity of antagonist (agonist) decreases as agonist (antagonist) activity increases. The experimental results show that the neuro-SMC provides excellent tracking control for different reference trajectories and could generate control signals to compensate the muscle fatigue.},
keywords = {Modelling & Control, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper presents a robust control strategy which is based on synergistic combination of a neural controller with sliding mode control (SMC) for online control of ankle movement using functional electrical stimulation (FES) of dorsiflexor and plantar flexor muscles in paraplegic subjects. We will refer to this method as neuro- SMC. The results indicate that neuro-SMC control can automatically determines the level of coactivation during tracking the desired ankle-joint angle. It is observed that at the low levels of activation, both muscles were engaged. The activity of antagonist (agonist) decreases as agonist (antagonist) activity increases. The experimental results show that the neuro-SMC provides excellent tracking control for different reference trajectories and could generate control signals to compensate the muscle fatigue.
Misaghian, K; Erfanian, A
Adaptive Neuro-Sliding Mode Control of FES-Cycling Inproceedings
In: Editor_Unkown_2008, (Ed.): pp. 044, IFESS_2008, Freiburg Concert Hall, Freiburg, Germany, 2008, ISBN: ISBN_Unkown_2008.
Abstract | Links | BibTeX | Tags: Modelling & Control, Neuromodulation
@inproceedings{IFESS2008_044,
title = {Adaptive Neuro-Sliding Mode Control of FES-Cycling},
author = {K Misaghian and A Erfanian},
editor = {Editor_Unkown_2008},
url = {https://ifess.org/files/proceedings/IFESS2008/IFESS2008_044_Misaghian.pdf},
isbn = {ISBN_Unkown_2008},
year = {2008},
date = {2008-09-01},
pages = {044},
publisher = {IFESS_2008},
address = {Freiburg Concert Hall, Freiburg, Germany},
abstract = {To evaluate the physiological effects of FES-cycling, it is crucial that both cadence cycling and workrate are well controlled. However, the major impediment to the development of satisfactory control systems for FES has been the highly non-linear and time-varying properties of electrically stimulated muscle which make control very difficult to achieve and limit the utility of open-loop FES control system. In this paper, we propose a robust control methodology which is based on synergistic combination of an adaptive single-neuron controller with sliding mode control (SMC) for control of FES-cycling in paraplegic subjects. The results of experiments on three paraplegic subjects show that the neuro-SMC can produce a smooth and prolonged cycling movement.},
keywords = {Modelling & Control, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
To evaluate the physiological effects of FES-cycling, it is crucial that both cadence cycling and workrate are well controlled. However, the major impediment to the development of satisfactory control systems for FES has been the highly non-linear and time-varying properties of electrically stimulated muscle which make control very difficult to achieve and limit the utility of open-loop FES control system. In this paper, we propose a robust control methodology which is based on synergistic combination of an adaptive single-neuron controller with sliding mode control (SMC) for control of FES-cycling in paraplegic subjects. The results of experiments on three paraplegic subjects show that the neuro-SMC can produce a smooth and prolonged cycling movement.
Omar-Pasha, O
Application of Pulsed Radio Frequency to the dorsal horn and dorsal roots Inproceedings
In: Editor_Unkown_2008, (Ed.): pp. 037, IFESS_2008, Freiburg Concert Hall, Freiburg, Germany, 2008, ISBN: ISBN_Unkown_2008.
Abstract | Links | BibTeX | Tags: Modelling & Control, Neuromodulation
@inproceedings{IFESS2008_037,
title = {Application of Pulsed Radio Frequency to the dorsal horn and dorsal roots},
author = {O Omar-Pasha},
editor = {Editor_Unkown_2008},
url = {https://ifess.org/files/proceedings/IFESS2008/IFESS2008_037_Omar-Pasha.pdf},
isbn = {ISBN_Unkown_2008},
year = {2008},
date = {2008-09-01},
pages = {037},
publisher = {IFESS_2008},
address = {Freiburg Concert Hall, Freiburg, Germany},
abstract = {A newly developed multifunctional electrode (PASHA-electrode(R)) combines diagnosis of the level at which afferences enter the spinal cord with treatment at these levels by applying PRF at the dorsal root entry zone, making functional DREZectomy. Background: The traditional idea of preventing the conduction of nociceptive impulses by burning a nerve appears overly mechanistic. Sluijter developed the Pulsed Radio Frequency (PRF) technique whereby a high electrical field is applied without overheating. Unlike radiofrequency thermocoagulation (RFTC), treating chronic pain with PRF has few side effects. Histochemical investigations revealed enzyme-like protein induction in PRF treated nerve cells which was not seen in cells treated with continuous RF. Moreover, histological analyses showed no significant tissue damage to the treated nerve cells. The technical limitations of instrumentation designed mainly for extraspinal use are preventing PRF treatment from reaching its full effective potential. PRF using the new multifunctional electrode with a stimulation period of 240 sec appears effective in the treatment of chronic pain patients. The flexible device enables us to develop new algorithms for the diagnosis and treatment of pain. Since we are treating the transmission and translation of pain and are modulating the dorsal horn entry zone, the origin of the nociceptive input is not a primary consideration.},
keywords = {Modelling & Control, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
A newly developed multifunctional electrode (PASHA-electrode(R)) combines diagnosis of the level at which afferences enter the spinal cord with treatment at these levels by applying PRF at the dorsal root entry zone, making functional DREZectomy. Background: The traditional idea of preventing the conduction of nociceptive impulses by burning a nerve appears overly mechanistic. Sluijter developed the Pulsed Radio Frequency (PRF) technique whereby a high electrical field is applied without overheating. Unlike radiofrequency thermocoagulation (RFTC), treating chronic pain with PRF has few side effects. Histochemical investigations revealed enzyme-like protein induction in PRF treated nerve cells which was not seen in cells treated with continuous RF. Moreover, histological analyses showed no significant tissue damage to the treated nerve cells. The technical limitations of instrumentation designed mainly for extraspinal use are preventing PRF treatment from reaching its full effective potential. PRF using the new multifunctional electrode with a stimulation period of 240 sec appears effective in the treatment of chronic pain patients. The flexible device enables us to develop new algorithms for the diagnosis and treatment of pain. Since we are treating the transmission and translation of pain and are modulating the dorsal horn entry zone, the origin of the nociceptive input is not a primary consideration.
Iwami, T
Bilateral Teleoperator System of Robot with Force Reflection using Functional Electrical Stimulation Inproceedings
In: Editor_Unkown_2008, (Ed.): pp. 042, IFESS_2008, Freiburg Concert Hall, Freiburg, Germany, 2008, ISBN: ISBN_Unkown_2008.
Abstract | Links | BibTeX | Tags: Modelling & Control, Neuromodulation
@inproceedings{IFESS2008_042,
title = {Bilateral Teleoperator System of Robot with Force Reflection using Functional Electrical Stimulation},
author = {T Iwami},
editor = {Editor_Unkown_2008},
url = {https://ifess.org/files/proceedings/IFESS2008/IFESS2008_042_Iwami.pdf},
isbn = {ISBN_Unkown_2008},
year = {2008},
date = {2008-09-01},
pages = {042},
publisher = {IFESS_2008},
address = {Freiburg Concert Hall, Freiburg, Germany},
abstract = {In this paper, we propose a new method in which the functional electrical stimulation technique of muscles is used to present the reaction forces to the operator. Three small electrodes and two position / orientation sensors are attached on the skin of the upper limb of the operator. Force reflection from the slave to the operator is achieved by functional electric stimulation through the surface electrodes. In this method there is no mechanical part in the master subsystem because the upper limb of the operator itself works as the master arm. In this paper the proposed man-machine interface is described and the effectiveness of the proposed method is illustrated by experiments using a seven axes manipulator.},
keywords = {Modelling & Control, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
In this paper, we propose a new method in which the functional electrical stimulation technique of muscles is used to present the reaction forces to the operator. Three small electrodes and two position / orientation sensors are attached on the skin of the upper limb of the operator. Force reflection from the slave to the operator is achieved by functional electric stimulation through the surface electrodes. In this method there is no mechanical part in the master subsystem because the upper limb of the operator itself works as the master arm. In this paper the proposed man-machine interface is described and the effectiveness of the proposed method is illustrated by experiments using a seven axes manipulator.
Yoshida, A; Seki, K
Cervical electrical stimulation to the left neck with surface elec-trodes for treatment of intractable epilepsy Inproceedings
In: Editor_Unkown_2008, (Ed.): pp. 002, IFESS_2008, Freiburg Concert Hall, Freiburg, Germany, 2008, ISBN: ISBN_Unkown_2008.
Abstract | Links | BibTeX | Tags: Modelling & Control, Neuromodulation
@inproceedings{IFESS2008_002,
title = {Cervical electrical stimulation to the left neck with surface elec-trodes for treatment of intractable epilepsy},
author = {A Yoshida and K Seki},
editor = {Editor_Unkown_2008},
url = {https://ifess.org/files/proceedings/IFESS2008/IFESS2008_002_Yoshida.pdf},
isbn = {ISBN_Unkown_2008},
year = {2008},
date = {2008-09-01},
pages = {002},
publisher = {IFESS_2008},
address = {Freiburg Concert Hall, Freiburg, Germany},
abstract = {We tried the cervical electrical stimulation similar to vagus nerve stimulation (VNS) by using surface electrodes for 5 patients suffering from intractable epilepsy. The cervical stimulation was performed once or twice every day at home and the stimulation electrodes were attached on the skin above common carotid artery in the left neck. Various types of improvement of epileptic symptoms were acquired in each patient after start of stimula-tion. We confirmed that seizure frequency decreased at least in 4 cases during observation period over 6months in the present study. Stimulation with surface electrode is easy and not invasive and we did not encounter any side effects. In conclusion, the cervical electrical stimulation we used to treat intractable epilepsy is safer and easier than the embedding type VNS and cumulative effect might be obtained.},
keywords = {Modelling & Control, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
We tried the cervical electrical stimulation similar to vagus nerve stimulation (VNS) by using surface electrodes for 5 patients suffering from intractable epilepsy. The cervical stimulation was performed once or twice every day at home and the stimulation electrodes were attached on the skin above common carotid artery in the left neck. Various types of improvement of epileptic symptoms were acquired in each patient after start of stimula-tion. We confirmed that seizure frequency decreased at least in 4 cases during observation period over 6months in the present study. Stimulation with surface electrode is easy and not invasive and we did not encounter any side effects. In conclusion, the cervical electrical stimulation we used to treat intractable epilepsy is safer and easier than the embedding type VNS and cumulative effect might be obtained.
2006
Ramachandran, A; Solzbacher, F; Koch, K P; Hoffmann, K P
Aspects of polymer encapsulation: Failure mode and effects analysis of implantable microsystems Inproceedings
In: Seki, K (Ed.): pp. 085, IFESS_2006, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@inproceedings{IFESS2006_085,
title = {Aspects of polymer encapsulation: Failure mode and effects analysis of implantable microsystems},
author = {A Ramachandran and F Solzbacher and K P Koch and K P Hoffmann},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_085_Ramachandran.pdf},
year = {2006},
date = {2006-09-01},
pages = {085},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {The failure mode and e?ects analysis is an important tool in understanding the problem related to the development cycle of implantable rnicrosystems. On the other hand adding more safety features to the implant without considering the problems does not increase the reliability. It rather leads to an overdesigned implant device. ln this paper the extract of a comprehensive study on the implant development, focussed on the aspect of polymer encapsulation is presented The study shows high relevance for the adhesion.},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
The failure mode and e?ects analysis is an important tool in understanding the problem related to the development cycle of implantable rnicrosystems. On the other hand adding more safety features to the implant without considering the problems does not increase the reliability. It rather leads to an overdesigned implant device. ln this paper the extract of a comprehensive study on the implant development, focussed on the aspect of polymer encapsulation is presented The study shows high relevance for the adhesion.
Andrews, B; Reynard, J
The bladder-button: A supra-pubic bladder insert combined with FES Inproceedings
In: Seki, K (Ed.): pp. 089, IFESS_2006, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@inproceedings{IFESS2006_089,
title = {The bladder-button: A supra-pubic bladder insert combined with FES},
author = {B Andrews and J Reynard},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_089_Andrews.pdf},
year = {2006},
date = {2006-09-01},
pages = {089},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {Reybard's self-retaining balloon urinary catheter, introduced in 1853 and improved by Foley 80 years ago, has undergone little change in basic design and is still the most widely used for bladder drainage. Long-term indwelling catheterisation is associated with high morbidity. Bacterial infection often occurs within one month, recurrent catheter blockage in 50% and leakage of urine in over 30% of cases. Here we propose a new alternative and indicate the design issues. The new device combines suprapubic access to the bladder with FES - the Bladder-Button. The prototype provides a more cosmetic alternative, which may be less prone to blockage. The device also incorporates sensors that are used to provide; a trigger for conditional neuromodulation. In addition these sensors can provide feedback to the patient on bladder status, warning of high pressures and may provide ambulatory diagnostic information.},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
Reybard's self-retaining balloon urinary catheter, introduced in 1853 and improved by Foley 80 years ago, has undergone little change in basic design and is still the most widely used for bladder drainage. Long-term indwelling catheterisation is associated with high morbidity. Bacterial infection often occurs within one month, recurrent catheter blockage in 50% and leakage of urine in over 30% of cases. Here we propose a new alternative and indicate the design issues. The new device combines suprapubic access to the bladder with FES - the Bladder-Button. The prototype provides a more cosmetic alternative, which may be less prone to blockage. The device also incorporates sensors that are used to provide; a trigger for conditional neuromodulation. In addition these sensors can provide feedback to the patient on bladder status, warning of high pressures and may provide ambulatory diagnostic information.
Miyashita, M; Goto, M; Sato, F; Matsuki, H; Handa, Y; Sato, T
A contactless power and signal transmission device for implanted functional electrical stimulation (FES) Inproceedings
In: Seki, K (Ed.): pp. 088, IFESS_2006, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@inproceedings{IFESS2006_088,
title = {A contactless power and signal transmission device for implanted functional electrical stimulation (FES)},
author = {M Miyashita and M Goto and F Sato and H Matsuki and Y Handa and T Sato},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_088_Miyashita.pdf},
year = {2006},
date = {2006-09-01},
pages = {088},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {This paper proposed a contactless power and signal transmission device using electromagnetic coupling for a Functional Electrical Stimulation (FES) system, which consists of two coils. The two coils are the primary coil outside and the secondary inside the body, and the in vivo coil is composed of a coupling of two parts, the one to receive stimulate power and the other to receive signal one, each at a different radio frequency. In this study, we aim at the simultaneous power-signal transmission system, which enables power and signal for muscle stimulation to be concurrently transferred from outside the body, while allowing for the separation inside. Besides, the induced voltage of the magnetic flux on signal transmission, suppressed to 0.15 V, the output signal voltage of 2 V or more was established at a signal frequency of 7.7 MHz, thus leading to stable operation. The study also aimed to reach for higher power output of the secondary coil leading to stable operation.},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper proposed a contactless power and signal transmission device using electromagnetic coupling for a Functional Electrical Stimulation (FES) system, which consists of two coils. The two coils are the primary coil outside and the secondary inside the body, and the in vivo coil is composed of a coupling of two parts, the one to receive stimulate power and the other to receive signal one, each at a different radio frequency. In this study, we aim at the simultaneous power-signal transmission system, which enables power and signal for muscle stimulation to be concurrently transferred from outside the body, while allowing for the separation inside. Besides, the induced voltage of the magnetic flux on signal transmission, suppressed to 0.15 V, the output signal voltage of 2 V or more was established at a signal frequency of 7.7 MHz, thus leading to stable operation. The study also aimed to reach for higher power output of the secondary coil leading to stable operation.
Sato, N; Ogura, T; Nakagawa, H; Seki, K; Handa, Y
Effect of sacral surface electrical stimulation on the prostatic urethra Inproceedings
In: Seki, K (Ed.): pp. 091, IFESS_2006, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@inproceedings{IFESS2006_091,
title = {Effect of sacral surface electrical stimulation on the prostatic urethra},
author = {N Sato and T Ogura and H Nakagawa and K Seki and Y Handa},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_091_Sato.pdf},
year = {2006},
date = {2006-09-01},
pages = {091},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {The purpose of this study was to clarify the morphologic change of the prostate after sacral surface electrical stimulation (ssES) in the healthy subjects by using Magnetic Resonance Imaging. Subjects were seven healthy males and all of them did not have any prostatic diseases. Electrical stimulation for 15 min was applied on the skin just above the posterior sacral foramens of the S2-4(sacral surface electrical stimulation) in all subjects. The morphologic change of the prostate after ssES was investigated by magnetic resonance image. Diameters of prostatic urethra (DPU) were significantly expanded after ssES. SsES has an influence on decreasing muscle tension of the prostate smooth muscle tissue. SsES causes an inhibition of the parasympathetic pelvic neurons and/or a facilitation of the sympathetic hypogastric neurons?? in the spinal cord via electrically induced afferent volleys from the pudendal?? nerve.},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
The purpose of this study was to clarify the morphologic change of the prostate after sacral surface electrical stimulation (ssES) in the healthy subjects by using Magnetic Resonance Imaging. Subjects were seven healthy males and all of them did not have any prostatic diseases. Electrical stimulation for 15 min was applied on the skin just above the posterior sacral foramens of the S2-4(sacral surface electrical stimulation) in all subjects. The morphologic change of the prostate after ssES was investigated by magnetic resonance image. Diameters of prostatic urethra (DPU) were significantly expanded after ssES. SsES has an influence on decreasing muscle tension of the prostate smooth muscle tissue. SsES causes an inhibition of the parasympathetic pelvic neurons and/or a facilitation of the sympathetic hypogastric neurons?? in the spinal cord via electrically induced afferent volleys from the pudendal?? nerve.
Gaunt, R A; Prochazka, A
11th Annual Conference of the International Functional Electrical Stimulation Society, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@booklet{IFESS2006_090,
title = {High-frequency blockade of the pudendal nerve using transcutaneous, capacitively coupled electrical stimulation},
author = {R A Gaunt and A Prochazka},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_090_Gaunt.pdf},
year = {2006},
date = {2006-09-01},
pages = {090},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {After spinal cord injury (SCI), external urethral sphincter (EUS) hyperreflexia often develops which can lead to an inability to properly empty the bladder. Short of catheterization and irreversible surgery, few options exist for managing this condition. High-frequency electrical stimulation can produce a reversible block of peripheral nerve conduction, and has been proposed as a way to block unwanted EUS contractions. We investigated the feasibility of a new stimulation technique using transcutaneous, capacitively coupled electrodes to produce a conduction block of the pudendal nerve (PN). Adhesive surface electrodes were placed over subcutaneous "pickup" electrodes which were connected to nerve cuffs or hook electrodes on the PNs in three isoflurane anesthetized cats. A portion of the current delivered to the surface electrodes is captured by the subcutaneous electrode and routed to the target nerve. Using this "stimulus router system" (SRS), high-frequency stimulation produced graduated blockade of EUS contractions elicited by proximal lowfrequency stimulation of the pudendal nerve. The SRS requires no implanted electronics and may aid in the management of EUS dysfunction after SCI.},
howpublished = {11th Annual Conference of the International Functional Electrical Stimulation Society},
month = {09},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {booklet}
}
After spinal cord injury (SCI), external urethral sphincter (EUS) hyperreflexia often develops which can lead to an inability to properly empty the bladder. Short of catheterization and irreversible surgery, few options exist for managing this condition. High-frequency electrical stimulation can produce a reversible block of peripheral nerve conduction, and has been proposed as a way to block unwanted EUS contractions. We investigated the feasibility of a new stimulation technique using transcutaneous, capacitively coupled electrodes to produce a conduction block of the pudendal nerve (PN). Adhesive surface electrodes were placed over subcutaneous "pickup" electrodes which were connected to nerve cuffs or hook electrodes on the PNs in three isoflurane anesthetized cats. A portion of the current delivered to the surface electrodes is captured by the subcutaneous electrode and routed to the target nerve. Using this "stimulus router system" (SRS), high-frequency stimulation produced graduated blockade of EUS contractions elicited by proximal lowfrequency stimulation of the pudendal nerve. The SRS requires no implanted electronics and may aid in the management of EUS dysfunction after SCI.
Mitsuhashi, K; Seki, K; Sato, N; Ogura, T; Yamamura, H; Handa, Y
A pilot study of dysphagia by surface electrical stimulation on suprahyoid muscles area as neuromodulation Inproceedings
In: Seki, K (Ed.): pp. 092, IFESS_2006, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@inproceedings{IFESS2006_092,
title = {A pilot study of dysphagia by surface electrical stimulation on suprahyoid muscles area as neuromodulation},
author = {K Mitsuhashi and K Seki and N Sato and T Ogura and H Yamamura and Y Handa},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_092_Mitsuhashi.pdf},
year = {2006},
date = {2006-09-01},
pages = {092},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {This pilot study examined the effect as neuromodulation of surface electrical stimulation (ES) on suprahyoid muscle area for dysphagia. The purpose of this study is to find out change of swallow function between before ES and after ES and to evaluate improvements as immediate effect and long term effect by ES. Swallow function of two patients with dysphagia was investigated by videofluorography (VF). After ES, both patients could swallow some food quickly. Particularly, this effect continued several hours once ES had been done. This result suggests that ES can be one of the useful methods to improve swallow function in the patients with dysphagia.},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
This pilot study examined the effect as neuromodulation of surface electrical stimulation (ES) on suprahyoid muscle area for dysphagia. The purpose of this study is to find out change of swallow function between before ES and after ES and to evaluate improvements as immediate effect and long term effect by ES. Swallow function of two patients with dysphagia was investigated by videofluorography (VF). After ES, both patients could swallow some food quickly. Particularly, this effect continued several hours once ES had been done. This result suggests that ES can be one of the useful methods to improve swallow function in the patients with dysphagia.
Davis, R; Sparrow, O; Burridge, J H; Turk, R; Wulff, C; Cosendai, G; Schulman, J
Post-stroke upper extremity rehabilitation using 5-7 implanted microstimulators: Surgical procedures Inproceedings
In: Seki, K (Ed.): pp. 086, IFESS_2006, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@inproceedings{IFESS2006_086,
title = {Post-stroke upper extremity rehabilitation using 5-7 implanted microstimulators: Surgical procedures},
author = {R Davis and O Sparrow and J H Burridge and R Turk and C Wulff and G Cosendai and J Schulman},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_086_Davis.pdf},
year = {2006},
date = {2006-09-01},
pages = {086},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {Seven Participants with post-stroke upper extremity weakness and spasticity were chosen and agreed to have 5-7 RF Microstimulators (RFM) implanted on Radial Nerve branches and then to undergo 3x 1 hour sessions/day of programmed electrical stimulation to extend the elbow, wrist and fingers. Their stroke had occurred earlier at a mean of 3.9yrs (1.1 to 10.5yr.); there were 4 Male and 3 Females, mean age of 49yrs, with a range of 32-62yrs. These 7 surgeries started in April 2005 and extended to March 2006. Pre-operatively, implantation sites were identified by needle EMG. Under local anaesthesia, using a 5mm incision, the targeted nerve/motor-points (N/MP) were identified using the inserted probe with stimulation, and then the RFM is inserted using the introducer and ejection tools. Each device receives power and activation commands via a 2 MHz RF inductive link from the external cuff coil connected to the Control Unit. RFMs can be retrieved during surgery and up to 8 days. Initially a total of 41 RFMs were implanted. In Pt $#$4, 2 more RFMs were inserted 6 months later in the triceps' N/MPs for improvement of elbow extension. Implantations took 4.9 hours (3.5 to 6 hrs). No RFMs have failed, no infections have occurred.},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
Seven Participants with post-stroke upper extremity weakness and spasticity were chosen and agreed to have 5-7 RF Microstimulators (RFM) implanted on Radial Nerve branches and then to undergo 3x 1 hour sessions/day of programmed electrical stimulation to extend the elbow, wrist and fingers. Their stroke had occurred earlier at a mean of 3.9yrs (1.1 to 10.5yr.); there were 4 Male and 3 Females, mean age of 49yrs, with a range of 32-62yrs. These 7 surgeries started in April 2005 and extended to March 2006. Pre-operatively, implantation sites were identified by needle EMG. Under local anaesthesia, using a 5mm incision, the targeted nerve/motor-points (N/MP) were identified using the inserted probe with stimulation, and then the RFM is inserted using the introducer and ejection tools. Each device receives power and activation commands via a 2 MHz RF inductive link from the external cuff coil connected to the Control Unit. RFMs can be retrieved during surgery and up to 8 days. Initially a total of 41 RFMs were implanted. In Pt $#$4, 2 more RFMs were inserted 6 months later in the triceps' N/MPs for improvement of elbow extension. Implantations took 4.9 hours (3.5 to 6 hrs). No RFMs have failed, no infections have occurred.
Martinez-Gomez, J; Yoshida, K; Kammer, S; Koch, K P; Hoffmann, K P
Theoretical modelling of microprobe tips for insertion into peripheral nerves Inproceedings
In: Seki, K (Ed.): pp. 087, IFESS_2006, Seiryo-cho, Aoba-ku, Sendai, Japan, 2006.
Abstract | Links | BibTeX | Tags: Microelectrode, Neuromodulation
@inproceedings{IFESS2006_087,
title = {Theoretical modelling of microprobe tips for insertion into peripheral nerves},
author = {J Martinez-Gomez and K Yoshida and S Kammer and K P Koch and K P Hoffmann},
editor = {K Seki},
url = {https://ifess.org/files/proceedings/IFESS2006/IFESS2006_087_Martinez-Gomez.pdf},
year = {2006},
date = {2006-09-01},
pages = {087},
publisher = {IFESS_2006},
address = {Seiryo-cho, Aoba-ku, Sendai, Japan},
abstract = {Tungsten needles are frequently being used as microprobes for the implantation of thinfilm electrodes into the peripheral nerves. Nevertheless, the effect of the tip geometric properties on the insertion performance has not been sufficiently characterized. We used theoretical models based on the finite element method (FEM) to calculate the buckling forces (Fb) that take place in the tip of a tungsten needle. Our design consists of a tip formed by two different angles and lengths, keeping the needle diameter constant. Moreover, the front tip geometry has also been analyzed. Our FEM simulation results showed that an increment in the angle between the shaft and the tip produces a slightly decrement of the Fb. This phenomenon suggests an improvement in the insertion behaviour during the penetration, reducing the exerted expected forces produced in this transition.},
keywords = {Microelectrode, Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
Tungsten needles are frequently being used as microprobes for the implantation of thinfilm electrodes into the peripheral nerves. Nevertheless, the effect of the tip geometric properties on the insertion performance has not been sufficiently characterized. We used theoretical models based on the finite element method (FEM) to calculate the buckling forces (Fb) that take place in the tip of a tungsten needle. Our design consists of a tip formed by two different angles and lengths, keeping the needle diameter constant. Moreover, the front tip geometry has also been analyzed. Our FEM simulation results showed that an increment in the angle between the shaft and the tip produces a slightly decrement of the Fb. This phenomenon suggests an improvement in the insertion behaviour during the penetration, reducing the exerted expected forces produced in this transition.
2004
Manola, L J; Roelofsen, B; Holsheimer, J
Motor cortex stimulation: a computer modelling study Inproceedings
In: Wood, Duncan; Taylor, Paul (Ed.): pp. 012, IFESS_2004, Bournemouth, United Kingdom, 2004, ISBN: ISBN_Unkown_2004.
Abstract | Links | BibTeX | Tags: Neuromodulation
@inproceedings{IFESS2004_012,
title = {Motor cortex stimulation: a computer modelling study},
author = {L J Manola and B Roelofsen and J Holsheimer},
editor = {Duncan Wood and Paul Taylor},
url = {https://ifess.org/files/proceedings/IFESS2004/IFESS2004_012_Manola.pdf},
isbn = {ISBN_Unkown_2004},
year = {2004},
date = {2004-09-01},
pages = {012},
publisher = {IFESS_2004},
address = {Bournemouth, United Kingdom},
abstract = {In this paper initial results obtained from computer modelling of Motor Cortex Stimulation for chronic pain treatment are presented. The model predicts that the thickness of the cerebrospinal fluid under the epidural electrode has a great influence on the electrical field in the motor cortex and therefore on fibre stimulation thresholds. It is further concluded that afferent fibres are easier to excite than efferent fibres of the same diameter, implying that their stimulation may be responsible for the analgesic effects. However, additional anatomical data and improvements of the volume conductor and fibre model are needed to allow a better prediction which neural structure responds best to a specific stimulation. Ultimately, this modelling study should help to understand the mechanisms of motor cortex stimulation and help to improve its efficacy.},
keywords = {Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
In this paper initial results obtained from computer modelling of Motor Cortex Stimulation for chronic pain treatment are presented. The model predicts that the thickness of the cerebrospinal fluid under the epidural electrode has a great influence on the electrical field in the motor cortex and therefore on fibre stimulation thresholds. It is further concluded that afferent fibres are easier to excite than efferent fibres of the same diameter, implying that their stimulation may be responsible for the analgesic effects. However, additional anatomical data and improvements of the volume conductor and fibre model are needed to allow a better prediction which neural structure responds best to a specific stimulation. Ultimately, this modelling study should help to understand the mechanisms of motor cortex stimulation and help to improve its efficacy.
Meglio, M
Motor cortex stimulation: a new perspective in the treatment of movement disorders and in pain management Inproceedings
In: Wood, Duncan; Taylor, Paul (Ed.): pp. 008, IFESS_2004, Bournemouth, United Kingdom, 2004, ISBN: ISBN_Unkown_2004.
Abstract | Links | BibTeX | Tags: Neuromodulation
@inproceedings{IFESS2004_008,
title = {Motor cortex stimulation: a new perspective in the treatment of movement disorders and in pain management},
author = {M Meglio},
editor = {Duncan Wood and Paul Taylor},
url = {https://ifess.org/files/proceedings/IFESS2004/IFESS2004_008_Meglio.pdf},
isbn = {ISBN_Unkown_2004},
year = {2004},
date = {2004-09-01},
pages = {008},
publisher = {IFESS_2004},
address = {Bournemouth, United Kingdom},
abstract = {In experimental cat models of spinothalamic tractotomy a thalamic hyperactivity of low threshold mechanoreceptor neurons was observed 3 wks after tractotomy. Motor cortex stimulation profoundly inhibited this abnormal firing, while sensory cortical stimulation was ineffective. On these basis Tsubokawa more than 10 years ago proposed motor cortex stimulation to relief deafferentation pain in humans. More recently this neuromodulation procedure has been utilized for the control of movement disorders particularly in advanced parkinsonism. The results reported in the literature are controversial. Personal experience (10 pain patients and 6 PD patients) is too preliminary to allow any conclusion on both applications, but we believe that uniformity in surgical procedure and in data collection is mandatory in order to collect meaningfull informations on this matter. Aim of this presentation is to discuss our protocols of MCS.},
keywords = {Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
In experimental cat models of spinothalamic tractotomy a thalamic hyperactivity of low threshold mechanoreceptor neurons was observed 3 wks after tractotomy. Motor cortex stimulation profoundly inhibited this abnormal firing, while sensory cortical stimulation was ineffective. On these basis Tsubokawa more than 10 years ago proposed motor cortex stimulation to relief deafferentation pain in humans. More recently this neuromodulation procedure has been utilized for the control of movement disorders particularly in advanced parkinsonism. The results reported in the literature are controversial. Personal experience (10 pain patients and 6 PD patients) is too preliminary to allow any conclusion on both applications, but we believe that uniformity in surgical procedure and in data collection is mandatory in order to collect meaningfull informations on this matter. Aim of this presentation is to discuss our protocols of MCS.
Thomson, S
Neuromodulation - Application in the clinical setting - Brief introduction Inproceedings
In: Wood, Duncan; Taylor, Paul (Ed.): pp. 005, IFESS_2004, Bournemouth, United Kingdom, 2004, ISBN: ISBN_Unkown_2004.
Abstract | Links | BibTeX | Tags: Neuromodulation
@inproceedings{IFESS2004_005,
title = {Neuromodulation - Application in the clinical setting - Brief introduction},
author = {S Thomson},
editor = {Duncan Wood and Paul Taylor},
url = {none},
isbn = {ISBN_Unkown_2004},
year = {2004},
date = {2004-09-01},
pages = {005},
publisher = {IFESS_2004},
address = {Bournemouth, United Kingdom},
abstract = {none},
keywords = {Neuromodulation},
pubstate = {published},
tppubtype = {inproceedings}
}
none