Cognitive Impairment with or Without Cerebellar Ataxia, also known as ciat, is related to aphasia and early infantile epileptic encephalopathy. An important gene associated with Cognitive Impairment with or Without Cerebellar Ataxia is SCN8A (Sodium Voltage-Gated Channel Alpha Subunit 8). Affiliated tissues include brain and kidney, and related phenotypes are intellectual disability and ataxia