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. 2004 May;17(4):308-11.
doi: 10.1002/ca.10205.

Number and size of motor units in thenar muscles

Humberto Santo Neto  1 , José Meciano Filho, Renato Passini Jr, Maria Julia Marques
Affiliations

Number and size of motor units in thenar muscles

Humberto Santo Neto et al. Clin Anat. 2004 May.

Abstract

The number and size of motor units (MUs) in the thenar muscles of 10 fresh adult cadavers (33-74 years old) were estimated by histological methods. The average number of MUs was 161 +/- 26 and the MU size was 93 +/- 11.5. Adductor pollicis showed a significantly greater MU size. The number of MUs in our histological study was in agreement with the number reported in previous studies using multiple point stimulation, the method currently used in the clinical investigation of neuromuscular disorders.

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