vermian cerebellar atrophycortical and cerebellar atrophyunilateral cerebellar atrophycerebellar hemisphere atrophycerebral and cerebellar atrophycongenital cerebellar atrophysuperior cerebellar atrophyprogressive cerebellar atrophyisolated cerebellar atrophymoderate cerebellar atrophysevere cerebellar atrophybilateral cerebellar atrophy