Migraine, Familial Hemiplegic, 1, also known as fhm1, is related to familial or sporadic hemiplegic migraine and migraine, familial hemiplegic, 3, and has symptoms including cerebellar ataxia, fever and hemiparesis. An important gene associated with Migraine, Familial Hemiplegic, 1 is CACNA1A (Calcium Voltage-Gated Channel Subunit Alpha1 A), and among its related pathways/superpathways are Transmission across Chemical Synapses and Dopamine-DARPP32 Feedback onto cAMP Pathway. Affiliated tissues include brain and trigeminal ganglion, and related phenotypes are seizure and tremor