Superior oblique myokymia

Quantitative description of the eye movement

Thurston, Stephen E. MD
Saul, Robert F. MD

Departments of Neurology and Ophthalmology, Geisinger Medical Center, Danville, PA.

Address correspondence and reprint requests to Dr. Stephen E. Thurston, Department of Neurology, Geisinger Medical Center, Danville, PA 17822-1405.

Received August 1, 1990. Accepted for publication in final form March 20, 1991.

Neurology 41(10):p 1679-1681, October 1991.

Article abstract

We studied superior oblique myokymia (intermittent uniocular microtremor) using magnetic scleral search coils. The monocular disorder consisted of both phasic and tonic components consistent with the primary, secondary, and tertiary actions of the superior oblique muscle. These observations support the hypothesis of a disorder restricted to the superior oblique motor unit.