SCN8A and Tremor: Neonatal onset is described in 6 (myoclonus in GRIA2, KCNQ2, SCN8A and STXBP1, tremor in SCN8A, dystonia in PCDH12, non-epileptic tonic and dystonic events, and episodic oculomotor abnormalities with tachycardia in ATP1A3).