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Transcarpal motor conduction velocity in carpal tunnel syndrome
Author(s) -
Walters R. Jon L.,
Murray Nicholas M.F.
Publication year - 2001
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.1096
Subject(s) - carpal tunnel syndrome , medicine , wrist , nerve conduction velocity , latency (audio) , median nerve , carpal tunnel , anatomy , surgery , electrical engineering , engineering
Transcarpal motor conduction to abductor pollicis brevis (APB) was evaluated in 43 patients (70 hands) with suspected carpal tunnel syndrome (CTS). Transcarpal motor conduction was abnormal in 80% of hands compared with 11.5% with prolongated distal motor latency from wrist stimulation. Transcarpal motor conduction was comparable in sensitivity with transcarpal sensory conduction and 2nd lumbrical–interosseous latency difference. Transcarpal motor conduction is a sensitive test for diagnosis of CTS. Sensory fibers were no more susceptible than motor fibers to compression in the carpal tunnel, and fibers to APB were as susceptible as those to the 2nd lumbrical muscle. © 2001 John Wiley & Sons, Inc. Muscle Nerve 24: 966–968, 2001