Lower median nerve block impairs precision grip

Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology
Shouchen DunZong-Ming Li

Abstract

The purpose of this study was to investigate precision grip impairment caused by a lower median nerve block at the wrist. The median nerve block was achieved by injecting bupivacaine hydrochloride into the carpal tunnel, which acutely simulated a median neuropathy. Seven healthy male subjects were instructed to grip, lift, and hold an instrumented handle within 60s using precision grip. The same tasks were performed before and after the nerve block. Force and torque data were recorded using two miniature 6-component force/torque transducers. The precision grip was quantified by the safety margin (i.e. the difference between the actual grip force and the minimal grip force to keep the object from dropping), the variation of grip force, and the migration area of center of pressure (i.e. the area defined by the center of pressure at a digit-transducer surface while holding the handle). Two subjects were unable to complete the precision grip tasks after the nerve block, and their data were excluded from the analyses. The median nerve block caused significant increases (P<0.05) in the safety margin of the grip force (>50%), the grip force variation (>80%), and the area of center of pressure migration (>250%). Median nerve block at t...Continue Reading

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Citations

Jan 12, 2013·Experimental Brain Research·Stacey L Gorniak, Jay L Alberts
Mar 5, 2013·Journal of Neuroengineering and Rehabilitation·Ke Li, Zong-Ming Li
Jun 1, 2014·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Ke LiZong-Ming Li
May 25, 2011·The Journal of Physiology·N RocheP Lindberg
May 26, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Mostafa AfifiJamie A Johnston
Dec 24, 2015·Frontiers in Human Neuroscience·Shinji KubotaKozo Funase
Sep 10, 2008·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Li-Chieh KuoYun-Nien Sun
Sep 3, 2008·The Journal of Hand Surgery·Sebastian GehrmannZong-Ming Li
Jun 7, 2008·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Maaike A HuysmansJaap H van Dieën
Dec 10, 2016·Frontiers in Human Neuroscience·Aude CarteronWei Zhang
Aug 5, 2006·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Zong-Ming Li, Ashish D Nimbarte

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