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Conduction block in neuralgic amyotrophy
Author(s) -
Watson Bradley V.,
Nicolle Michael W.,
Brown John D.
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.1041
Subject(s) - electrophysiology , brachial plexus , amyotrophy , medicine , trunk , block (permutation group theory) , nerve conduction velocity , anatomy , biology , atrophy , ecology , geometry , mathematics
We describe two cases of neuralgic amyotrophy with electrophysiological evidence of conduction block across the lower trunk of the brachial plexus. Low‐output impedance stimulation of the cervical spinal roots in combination with collision was used to accurately demonstrate the conduction block. Complete electrophysiological recovery of the conduction block occurred within 3 months. Early clinical and electrophysiological recovery in both patients suggests that, in some cases, demyelination may predominate early in the course of neuralgic amyotrophy. © 2001 John Wiley & Sons, Inc. Muscle Nerve 24: 559–563, 2001