Episodic Ataxia Type 1

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11 Nov 2026 0 comments

CLINICAL CHARACTERISTICS: Episodic ataxia type 1 (EA1) is a potassium channelopathy characterized by constant myokymia and dramatic episodes of spastic contractions of the skeletal muscles of the head, arms, and legs with loss of both motor coordination and balance. During attacks individuals may experience a number of variable symptoms including dysarthria, stiffening of the body, blurred vision, diplopia, nausea, headache, vertigo, diaphoresis, clumsiness, and difficulty in breathing, among...