Episodic ataxia, type 1 (medical condition)

A rare genetic disorder characterized by episodes of incoordination and unsteadiness and continuous muscle movement (myokymia). Stress and exertion may trigger the ataxic episodes which usually last for only a few minutes and can occur several times a day. Type 1 is caused by a defect in the potassium channel gene on chromosome 12p13. See also Episodic ataxia, type 1