1 2-15 Seconds, minutes None Myokymia and jerky movements of face and limbs EA 2 2-20 Hours, days Downbeat nystagmus, migraine, vertigo, nausea, vomiting, weakness, dysarthria
[hkjpaed.org]
Table 2 Major types of autosomal dominant episodic ataxias (EA) Age of onset (years) Duration of attack Additional manifestations during attack Interictal manifestations EA
[hkjpaed.org]
Ataxia, nystagmus EA 3 1-42 1 minute to 6 hours Myokymia, migraine, tinnitus, vertigo, dysarthria None EA 4 23-60 Brief Vertigo, diplopia, interictal nystagmus and abnormal
[hkjpaed.org]