Control of FES thumb force using slip information obtained from the cutaneous electroneurogram in quadriplegic man

Haugland, Morten Kristian; Lickel, A.; Haase, Jens; Sinkjær, Thomas

doi:10.1109/86.769412

Cited by 93 publications

(55 citation statements)

References 36 publications

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“…This could be achieved in the case of grasping function by adjusting the grasping style and the grasping strength according to the task that needs to be carried out. Some promising results in that direction have already been published by Lickel and Sinkjaer 34,35 who used the impulses from skin receptors of the index ®nger to control the slippage of the object during grasping. Similarly, an attempt was made to control the foot lifting by using activity of the a erent peroneal nerve ®bers during locomotion (Sinkjaer, personal communication).…”

Section: Future Developmentsmentioning

confidence: 99%

Functional electrical stimulation for grasping and walking: indications and limitations

et al. 2001

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This review describes the state of art in the ®eld of Functional Electrical Stimulation (FES) and its impact on improving grasping and walking functions in acute and chronic Spinal Cord Injured (SCI) patients. It is argued that during the early rehabilitation period the FES systems with surface stimulation electrodes should be used to assist training of hand and leg movements in SCI patients. Our clinical trials have shown that a number of acute SCI patients with impaired walking and grasping functions could improve these functions due to training with an adjustable FES system to the point that they ®nally did not need the FES system to carry out these tasks. Other acute SCI patients, who did not recover the desired function, were enabled to perform either walking or grasping with the FES assistance. We believe that the subjects who can perform grasping or walking with the help of FES, and still use the neuroprosthesis 6 months after being subjected to the FES training, should consider the FES system as a prosthetic device in Activities of Daily Living (ADL). Despite the signi®cant technical progress achieved in the last 10 to 15 years in the FES ®eld, there is a general consensus that these systems are not su ciently advanced and that they need further development. The limited acceptance of the FES technology can be in part explained by the fact that it is not completely mature and that the patients still require daily assistance to use the FES systems. Nevertheless the present FES treatments combined with conventional occupational and physical therapy still remain the most promising approach in rehabilitating SCI patients. In this review, advantages and limitations of di erent FES systems that are used to restore grasping and walking functions are discussed. Spinal Cord (2001) 39, 403 ± 412

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Section: Future Developmentsmentioning

confidence: 99%

Functional electrical stimulation for grasping and walking: indications and limitations

et al. 2001

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“…Electrical energy is required for many such applications, including biosensors 1 , growth control devices 2 , artificial organs and nerves 3 and 4 , telemetric readings, and monitoring 5 . Most such devices are operated under "in-vivo" circumstances, which need biocompatible batteries with a long service life.…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole as cathode materials for Zn-polymer battery with various biocompatible aqueous electrolytes

Sultana

Guo

et al. 2013

Electrochimica Acta

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Polypyrrole films doped with p-toluenesulfonic anions on stainless steel mesh substrates were prepared by the electropolymerization method. A Zn/aqueous solution/polymer battery system was thus established with the polymer film as the cathode and three different biocompatible aqueous electrolytes. The mechanism of the anode reaction can be explained as the dissolution of Zn. It was found, however, that the discharge performance, including the discharge plateaus and capacities, were significantly affected by the polymer reactions. To elucidate the reaction mechanisms of the conductive polymer, its electrochemical properties were systematically studied by several techniques, including cyclic voltammetry, electrochemical impedance spectroscopy, and monitoring mass changes with an electrochemical quartz crystal microbalance. The redox states of polypyrrole before and after discharge were investigated by Raman spectroscopy. The reaction mechanisms of the polypyrrole film and its effects on the discharge performance are thus discussed based on the results. Polypyrrole films doped with p-toluenesulfonic anions on stainless steel mesh substrates were prepared by the electropolymerization method. A Zn/aqueous solution/polymer battery system was thus established with the polymer film as the cathode and three different biocompatible aqueous electrolytes. The mechanism of the anode reaction can be explained as the dissolution of Zn. It was found, however, that the discharge performance, including the discharge plateaus and capacities, were significantly affected by the polymer reactions. To elucidate the reaction mechanisms of the conductive polymer, its electrochemical properties were systematically studied by several techniques, including cyclic voltammetry, electrochemical impedance spectroscopy, and monitoring mass changes with an electrochemical quartz crystal microbalance.The redox states of polypyrrole before and after discharge were investigated by Raman spectroscopy. The reaction mechanisms of the polypyrrole film and its effects on the discharge performance are thus discussed based on the results.

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“…Similar electrodes have been used in chronic human applications to control handgrasp and to restore dropfoot [10,11].…”

Section: Intraoperative Recording Of Eng From Human Sacral Nerve Rootsmentioning

confidence: 99%

Intraoperative recording of ENG from human sacral nerve roots

Rijkhoff

Kurstjens

Vidal³

et al.

2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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Abstract-Intraoperative recoding of ENG from the S3 extradural sacral nerve roots was performed in 2 SCI patients. The goal of this work was to study the relation between mechanical stimulation of the urinary bladder, rectum and skin and the resulting ENG-signals. These signals could be used to detect the onset of a bladder contraction. This concept could be used in an implantable neuroprostheses to treat detrusor hyperreflexia. The recorded human signals are consistent with data from animal studies. However, more human studies are needed. Keywords -Sacral nerve roots, urinary bladder, detrusor hyperreflexia, electrical stimulation, ENG. I. INTRODUCTIONDetrusor hyperreflexia (DH) is the most common form of detrusor dysfunction in spinal cord injury and causes a failure of the storage function of the lower urinary tract. It is characterized by involuntary detrusor contractions during bladder filling at relative small volumes which cannot be suppressed consciously and cause an increase in intravesical pressure of more than 15 cm H 2 O. DH causes a low storage capacity and transient high intravesical pressures resulting in incontinence, risk for kidney damage and bladder hypertrophy.The first step in the treatment of DH is medication. However, pharmacological inhibition of DH (e.g. by oxybutynin) is often unsuccessful and its usefulness is limited by intolerance to oral administration due to side effects as salivary reduction with dry mouth, vision disturbance and inhibition of gut motility [1]. Especially in patients with SCI these side effects are very troublesome. In the case of failure of the drug, destructive treatments are advocated such as surgical augmentation of the bladder [2] and surgical deafferentation of the bladder [3].An alternative option is the use of electrical stimulation. The ratio of this treatment modality is based on the existence of spinal inhibitory systems which are capable of interrupting a detrusor contraction. These inhibitory systems can be activated by electrical stimulation of appropriate afferent nerve fibers. Electrical stimulation would therefore be a nondestructive alternative for patients who are refractory to drugs or cannot tolerate the side effects.Bladder inhibition can be achieved by stimulation of afferent anorectal branches of the pelvic nerve, the dorsal penile/clitoris nerve [4], the pudendal nerve and the dorsal sacral nerve roots [5]. Several studies have shown that electrical stimulation of these afferents may have long lasting effects on bladder inhibition in non-neuropathic bladder dysfunction. However, this is not the case in neuropathic bladder dysfunction [6]. So chronic stimulation is needed.The stimulator could be on continuously during the filling phase although stimulation is actually only needed to inhibit a contraction. The stimulator could thus be turned off if no reflex contractions are present. In order to allow event driven stimulation a sensor is needed that detects the onset of a contraction.Implantable sensors with sufficiently long biocompatibilit...

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Control of FES thumb force using slip information obtained from the cutaneous electroneurogram in quadriplegic man

Cited by 93 publications

References 36 publications

Functional electrical stimulation for grasping and walking: indications and limitations

Functional electrical stimulation for grasping and walking: indications and limitations

Polypyrrole as cathode materials for Zn-polymer battery with various biocompatible aqueous electrolytes

Intraoperative recording of ENG from human sacral nerve roots

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