Episodic Ataxia Type 1 (EA-1)
Molecular genetics and pathogenesis
The ataxic spells of EA-1 are very brief, lasting seconds to minutes, and may recur frequently through the day. Myokymia (rippling movements of muscle) is present between ataxic episodes.
Jen JC, Graves TD, Hess EJ, Hanna MG, Griggs RC, Baloh RW; CINCH investigators. Primary episodic ataxias: diagnosis, pathogenesis and treatment. Brain. 2007 Oct;130(Pt 10):2484-93.