Fine-wire electromyographic recording during force generation. Application to index finger kinesiologic studies

American Journal of Physical Medicine & Rehabilitation
C G BurgarV R Hentz

Abstract

When accurately placed, fine-wire electrodes (FWEs) permit selective electromyographic recording during kinesiologic studies; however, their potential to limit contraction of the index finger muscles has not previously been evaluated. Given that these electrodes cannot be reinserted, reliable techniques are necessary to achieve proper placement while minimizing subject discomfort and electrode waste. The small size, close arrangement, and anatomic variability of hand and forearm muscles create challenges to achieving these goals. In this study, we simultaneously measured maximal fingertip forces and fine-wire electromyographic signals from all seven muscles of the index finger. Forces in five directions, with and without FWEs in place, were not statistically different (repeated-measures analysis of variance, P < 0.46) in five healthy adult subjects. To guide electrode placement, we identified skin penetration landmarks, direction of needle advancement, and depth of muscle fibers. Fibers of flexor digitorum superficialis and flexor digitorum profundus to the index finger were more distal than depicted in textbooks, requiring electrode placement at or distal to the midpoint of the forearm. For these muscles and the extensor digit...Continue Reading

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Citations

May 20, 2009·Experimental Brain Research·Chang Kook KimJae Kun Shim
Jul 25, 2008·Journal of Neurophysiology·J N A L LeijnseP M Quesada
May 21, 2020·Scientific Reports·Carl R BeringerRobert A Gaunt
Apr 17, 2009·Journal of Neurophysiology·Francisco J Valero-CuevasEmanuel Todorov
Dec 6, 2014·Cerebral Cortex·Hana BurianováBlake W Johnson
Feb 17, 2005·Journal of Biomechanics·Francisco J Valero-Cuevas
Jul 28, 2021·Experimental Brain Research·Shirin Madarshahian, Mark L Latash
Jan 16, 2013·NeuroImage·Hana BurianováBlake W Johnson
Sep 14, 2021·Archives of Physical Medicine and Rehabilitation·Chae Hyeon RyouHang Jae Lee

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