Wednesday, October 13, 2021

A Comparative Study Using Electromyography to Assess Hand Exercises For Rehabilitation After Ulnar Nerve Decompression

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J Plast Reconstr Aesthet Surg. 2021 Sep 20:S1748-6815(21)00428-9. doi: 10.1016/j.bjps.2021.08.042. Online ahead of print.

ABSTRACT

Ulnar nerve (UN) entrapment is a common peripheral neuropathy and can lead to dysfunction of both sensory and motor function of the hand. Surgical release is the mainstay of treatment, but post-operative rehabilitation of UN innervated intrinsic muscles is lacking evidence. This cohort study utilized surface electromyography (EMG) and assessed the activation of UN innervated intrinsic and extrinsic hand muscles during four exercises in healthy participants. Exercises included rotating baoding balls, squeezing a stress ball or grip device every second, and repetitive finger abduction against a rubber band. Normalized percent activation of each muscle was calculated for each exercise. It was demonstrated that rubber band resistance (RBR) finger abduction showed significantly increased activation in both intri nsic muscles tested, while minimizing activation of the one tested UN innervated extrinsic muscle. Thus, to best target the intrinsic hand muscles without fatiguing extrinsic muscles, the inexpensive and practical RBR exercise is beneficial in post-UN release rehabilitation.

PMID:34642062 | DOI:10.1016/j.bjps.2021.08.042

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