myokymia /myo·kym·ia/ (-ki´me-ah)
1. a benign condition marked by brief spontaneous tetanic contractions of motor units or groups of muscle fibers, usually adjacent groups of fibers contracting alternately.
2. myoky´mic
my·o·ky·mi·a (m   -k m - , -k m-)n. A benign condition, often familial, characterized by irregular twitching of groups of muscle fibers giving a rippling appearance to the overlying skin. Also called kymatism. |
myokymia
a benign condition in which there is persistent quivering of the muscles.
myokymia
Twitching of a few bundles of fibres of the eyelid muscle. It occurs most commonly when fatigued, sometimes on exposure to cold, and in some pathological cases (e.g. multiple sclerosis) in which case the entire muscle is involved. Superior oblique myokymia can often be diagnosed by noting fine torsional nystagmus of the affected eye on slit-lamp examination. In cases where no nystagmus is noted, a patient's history of monocular episodic oscillopsia, associated with vertical diplopia, may be sufficient to make a diagnosis. The use of carbamazepine or propranolol has been suggested as possible treatments in stopping the myokymia. See orbicularis muscle; multiple sclerosis.
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