High Quality Content by WIKIPEDIA articles! Ataxic cerebral palsy is observed in approximately 5-10% of all cases of cerebral palsy, making it the least frequent form of cerebral palsy diagnosed.Ataxic cerebral palsy is caused by damage to cerebellar structures, differentiating it from the other two forms of cerebral palsy: spastic cerebral palsy (damage to cortical motor areas and underlying white matter) and choreoatheotic cerebral palsy (damage to basal ganglia).