PMID: 8964772Apr 1, 1996Paper

Restoration of pronosupination control by FNS in tetraplegia--experimental and biomechanical evaluation of feasibility

Journal of Biomechanics
M A LemayM Keith

Abstract

Individuals with C5/C6 tetraplegia lack voluntary control of the forearm pronators. We evaluated the feasibility of restoring forearm pronation/supination control using an electrically activated pronator opposed by voluntary supination. To this end, we measured the electrically produced pronation moments of subjects with tetraplegia. The maximal pronation moment achieved by stimulating the pronator quadratus ranged from 30 to 100 N cm in three forearms of two subjects. These moments were sufficient to produce forearm pronation in all three forearms. Voluntary control of pronosupination during constant pronator stimulation was achieved by having the subject voluntarily supinate or relax to change the balance of rotational torques acting on the forearm. In all cases, the subjects were able to supinate voluntarily against the continuously stimulated pronator, producing intermediate angles between full pronation and full supination. We also observed under some conditions that subjects could voluntarily pronate and supinate even without pronator stimulation. Using a biomechanical model, we show how pronation can be initiated from a supinated position using the brachioradialis, with gravity completing the pronation. This method of pr...Continue Reading

References

May 1, 1989·The Journal of Hand Surgery·M W KeithJ W Jatich
Sep 1, 1986·IEEE Transactions on Bio-medical Engineering·J Allin, G F Inbar
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Oct 1, 1996·Journal of Biomechanics·M A Lemay, P E Crago

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Citations

Aug 5, 2005·Annals of Biomedical Engineering·Katherine R S HolzbaurScott L Delp
Jul 18, 2002·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·A NaitoY-J Sun
Oct 1, 2001·Neuromodulation : Journal of the International Neuromodulation Society·T R Scott, M Haugland
Nov 7, 2000·Assistive Technology : the Official Journal of RESNA·W M Grill, R F Kirsch
Jul 30, 2002·Hand Clinics·Harry HoyenMichael Keith
Jul 15, 2000·IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·R T LauerW J Heetderks
Apr 16, 1998·IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·P E CragoE J Perreault
Feb 24, 2001·IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·A T Au, R F Kirsch
Sep 20, 2001·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·T R ScottC Gschwind
Apr 29, 1998·IEEE Transactions on Bio-medical Engineering·B SmithP H Peckham
Feb 15, 2007·Muscle & Nerve·Lynne R Sheffler, John Chae
Jul 13, 2018·Topics in Spinal Cord Injury Rehabilitation·Kevin L KilgoreP Hunter Peckham
Mar 20, 2002·The Journal of Hand Surgery·P Hunter PeckhamFred W Montague

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