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. 2018 Nov;58(5):735-737.
doi: 10.1002/mus.26295. Epub 2018 Oct 4.

Motor unit number estimation of human abductor hallucis from a compound muscle action potential scan

Xiaoyan Li  1   2 , Ya Zong  1   2   3   4 , Cliff S Klein  3 , Ping Zhou  1   2   3
Affiliations

Motor unit number estimation of human abductor hallucis from a compound muscle action potential scan

Xiaoyan Li et al. Muscle Nerve. 2018 Nov.

Abstract

Introduction: This study performed motor unit number estimation (MUNE) of the abductor hallucis (AH) muscle from 16 healthy control participants on the basis of the compound muscle action potential (CMAP) scan.

Methods: Muscle responses to electrical stimuli ranging from subthreshold to supramaximal intensity were recorded, and MUNE was determined from a model of the responses (MScanFit program).

Results: The average CMAP amplitude and MUNE of the AH for the right and left sides combined were 19.6 ± 0.75 mV and 127 ± 5 (mean ± SE), respectively.

Discussion: Findings of the study provide useful information about the motor unit number of the AH. Muscle Nerve 58: 735-737, 2018.

Keywords: CMAP scan; abductor hallucis; compound muscle action potential (CMAP); motor unit number estimation (MUNE); muscle.

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Conflict of interest statement

Disclosure of Conflicts of Interest

None of the authors has any conflict of interest to disclose.

Figures

Figure 1.
Figure 1.
Examples of compound muscle action potential (CMAP) scan from the same subject on two different days. Stimulating ranges: 10.25 mA - 29.75 mA (day 1), 12 mA - 35.16 mA (day 2). Maximal CMAP amplitude: 18.1 mV (day 1), 18.78 mV (day 2). Mean motor unit size: 166.06 µV (day 1), 173.39 µV (day 2).
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