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Utility of an EMG mapping study in treating cervical dystonia
Author(s) -
Van Gerpen Jay A.,
Matsumoto Joseph Y.,
Ahlskog J. Eric,
Maraganore Demetrius M.,
McManis Philip G.
Publication year - 2000
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 - 10.1002/1097-4598(200011)23:11<1752::aid-mus12>3.0.co;2-u
Subject(s) - cervical dystonia , dystonia , medicine , botulinum toxin , electromyography , physical medicine and rehabilitation , physical therapy , anesthesia , psychiatry
Intramuscular injections of botulinum toxin are the cornerstone of treatment for cervical dystonia. Controversy exists regarding the necessity for EMG‐guided injections. We compared the clinical examination of four movement disorder specialists to an electromyographic (EMG) mapping study. Clinical predictions of individual muscle involvement were only 59% sensitive and 75% specific. Muscle hypertrophy, shoulder elevation, and dominant head vector did not bolster clinical accuracy. An EMG mapping study facilitates identification of dystonic muscles in cervical dystonia, which may enhance botulinum toxin therapy. © 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 1752–1756, 2000.