Spastic Ataxia 5 is related to spastic ataxia 5, autosomal recessive and optic atrophy 9, and has symptoms including ataxia, muscle spasticity and myoclonus. An important gene associated with Spastic Ataxia 5 is AFG3L2 (AFG3 Like Matrix AAA Peptidase Subunit 2), and among its related pathways/superpathways is Mitochondrial calcium ion transport.