Typically,<unk>  presents as bouts of<unk>  induced by startle, stress, or exertion. Some patients also have continuous tremors of various motor groups, known as myokymia. Other patients have nystagmus, vertigo, tinnitus, diplopia or seizures.
Episodic ataxia
Myopathic gait
Holmes tremor
Parkinsonian gait
Pseudoathetosis
Periodic paralysis
Paroniria
Chorea 