Migraine, Familial Hemiplegic, 3, also known as fhm3, is related to hemiplegia and migraine with aura, and has symptoms including hemiparesis, hemiplegia and photophobia. An important gene associated with Migraine, Familial Hemiplegic, 3 is SCN1A (Sodium Voltage-Gated Channel Alpha Subunit 1), and among its related pathways/superpathways are Activation of cAMP-Dependent PKA and Neuropathic Pain-Signaling in Dorsal Horn Neurons. Related phenotypes are migraine with aura and phonophobia