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Myotonic dystrophy: limited electromyo‐graphic abnormalities in 2 definite cases
Author(s) -
Sun Sallie F.,
Streib Erich W.
Publication year - 1983
Publication title -
clinical genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.543
H-Index - 102
eISSN - 1399-0004
pISSN - 0009-9163
DOI - 10.1111/j.1399-0004.1983.tb01857.x
Subject(s) - myotonia , myotonic dystrophy , medicine , myotonia congenita , electromyography , masseter muscle , anatomy , physical medicine and rehabilitation
Two women, aged 37 and 38 , with definite myotonic dystrophy are presented. Neither patient had clinical myotonia although both experienced intermittent jaw tightness. Electromyographic (EMG) myotonia was seen only in the masseter muscle in one and in the masseter and flexor pollicis longus muscle in the other patient. The detection rate of EMG‐myotonia in clinically normal heterozygotes increases if distal, proximal and cranial nerve innervated muscles are examined.