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Masticatory spasm in facial hemiatrophy
Author(s) -
Kaufman Michael D.
Publication year - 1980
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.410070614
Subject(s) - masticatory force , hemifacial spasm , facial muscles , medicine , masseter muscle , wasting , facial nerve , muscle spasm , trigeminal nerve , muscles of mastication , anatomy , anesthesia , orthodontics , temporomandibular joint
Spontaneous spasms began in the left masseter muscle six years following the onset of facial hemiatrophy in a young woman. A dental procedure had preceded the original facial wasting by four weeks. The electromyographic findings were similar to those described in hemifacial spasm and consisted of brief bursts of one to four morphologically different potentials, each firing at rates of up to 200 Hz. The findings demonstrate that spontaneous activity due to nerve injury can arise in muscles innervated by the trigeminal nerve.