Abnormal associated movements in facial palsy - Long-term follow-up with integral electromyography. : -Long-term Follow-up with Integral Electromyography-

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Fifty patients with abnormal associated movements of facial muscles (AAMs) were chosen from among 1, 694 with facial palsy who visited the Department of Otolaryngology of Kitano Hospital between 1973 and 1982 and who were followed for prolonged periods.The electromyographic recording of AAMs became possible 3 to 4 months after the onset of facial palsy. Long-term follow-up showed that AAMs were most intense 1 to 3 years after the onset of facial palsy. The severity of the paralysis of the frontal, orbicularis oculi and orbicularis oris muscles varied. Thus, the normalization of AAMs is not always synchronous among all the muscles during recovery, but many patients showed remission of AAMs, once recovery of each muscle began, even if belatedly. AAMs were far more common in the frontal muscle than in the orbicularis oris muscle, and both the severity and the symptoms of AAMs were greater in the frontal muscle. The authors were of the impression that the muscle relaxant Myonal benefited AAMs when administered during the period of remission. It should be noted, however, that its beneficial effect has not, yet been statistically established, in part because our investigation included a limited member of patients.