A Dilemma in Stroke Application: Standard or Modified Motor Unit Number Index?

The recent advent of motor unit number index (MUNIX) technique has provided a convenient and clinically applicable approach to estimating motor unit population changes in a muscle (Nandedkar et al., 2004, 2010). It uses compound muscle action potential (CMAP) and surface electromyogram (EMG) at different voluntary contraction levels to produce an index associated with motor unit number changes in the muscle. Compared with laborious motor unit number estimation (MUNE) techniques, the MUNIX protocol is easy and quick to implement and can minimize discomforts caused by electrical stimuli.

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