Spastic Ataxia 1, Autosomal Dominant, also known as spax1, is related to spastic ataxia 1 and spastic ataxia 2, autosomal recessive, and has symptoms including cerebellar ataxia and memory loss. An important gene associated with Spastic Ataxia 1, Autosomal Dominant is VAMP1 (Vesicle Associated Membrane Protein 1). Affiliated tissues include eye and brain, and related phenotypes are hyperreflexia and hypertonia