Cerebellar Ataxia, Impaired Intellectual Development, and Dysequilibrium Syndrome 4, is also known as cerebellar ataxia, mental retardation, and dysequilibrium syndrome 4, and has symptoms including ataxia, truncal An important gene associated with Cerebellar Ataxia, Impaired Intellectual Development, and Dysequilibrium Syndrome 4 is ATP8A2 (ATPase Phospholipid Transporting 8A2).