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Ephaptic transmission in hemifacial SPASM: A single‐fiber EMG study
Author(s) -
Sanders Donald B.
Publication year - 1989
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.880120810
Subject(s) - hemifacial spasm , facial nerve , facial muscles , medicine , electromyography , microvascular decompression , peripheral , anesthesia , anatomy , physical medicine and rehabilitation , trigeminal neuralgia
In two patients with hemifacial spasm (HFS), single‐fiber EMG recordings in facial muscles demonstrated low jitter in the late responses produced by stimulation of peripheral branches to other facial muscles. Surgical decompression of the facial nerve in one patient was followed by clinical improvement and disappearance of the abnormal late responses. These observations are consistent with the hypothesis that there is ephaptic transmission among peripheral branches of the facial nerve at the site of compression in HFS.