Motor unit number estimation of human abductor hallucis from a compound muscle action potential scan: CMAP Scan MUNE of AH

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.