<unk>  (EA) is an autosomal dominant disorder characterized by sporadic bouts of<unk>  (severe discoordination) with or without myokymia (continuous muscle movement).<unk>  can be provoked by stress, startle, or heavy exertion such as exercise. Symptoms can first appear in infancy. There are at least 6 loci for EA, of which 4 are known genes. Some patients with EA also have migraine or progressive cerebellar degenerative disorders, symptomatic of either familial hemiplegic migraine or spinocerebellar<unk> . Some patients respond to acetazolamide though others do not.
Episodic ataxia
Pseudoathetosis
Chorea
Choreoathetosis
Myoclonus
Lenticonus
Dystonia
Sensory ataxia