convulsive tic
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fa·cial tic
involuntary twitching of the facial muscles, sometimes unilateral.
convulsive tic
a disorder of the facial nerve, causing involuntary spasmodic contractions of the facial muscles supplied by that nerve. Also called hemifacial spasm. See also Gilles de la Tourette's syndrome.
convulsive tic
Spasm of the facial muscles supplied by the seventh cranial nerve.
See also: tic