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Voice tremor

Dysregulation of voluntary expiratory muscles

Departments of Internal Medicine (Divisitrn of Neurology) (Drs. Tomoda. Shibasaki. and Kuroda) and Otolaryngology (Dr. Shin), Saga Medical School, Saga, Japan.

We studied three patients; two with voice and hand tremor, and one with voice tremor. Voice tremor was associated with synchronous rhythmic contraction of cricothyroid and rectus abdominis muscles, but not always vocalis muscle. Voice tremor was manifested only in voluntary phonation or expiration, not in involuntary phonation, voluntary inspiration, or involuntary expiration and inspiration (breathing at rest). Impaired regulation of the CNS programs innervating the voluntary expiratory muscles probably causes voice tremor. Clonazepam and propranolol were helpful in blinded studies.

Address correspondence and reprint requests to Dr. Shibasaki,. Division of Neurology, Department of Internal Medicine, Saga Medical School, Nabeshima, Saga 840-01, Japan.

Received Dec 10, 1985. Accepted for publication April 14, 1986.

This article has been cited by other articles:

				K. A. Farinella, T. J. Hixon, J. D. Hoit, B. H. Story, and P. A. Jones Listener perception of respiratory-induced voice tremor. Am J Speech Lang Pathol, February 1, 2006; 15(1): 72 - 84. [Abstract] [Full Text] [PDF]