title: Brainstem and cerebellar changes after cerebrovascular accidents: magnetic resonance imaging.
abstract: We illustrate the various types of secondary degeneration in the brainstem and/or cerebellum detected on magnetic resonance (MR) images obtained after cerebrovascular accidents. The changes include: (a) ipsilateral nigral degeneration after striatal infarction; (b) Wallerian degeneration of the pyramidal tract in the brainstem after supratentorial pyramidal tract or motor cortex injury; (c) Wallerian degeneration of the corticopontine tract in the brainstem after frontal lobe infarction; (d) ipsilateral brainstem atrophy and crossed cerebellar atrophy due to an extensive supratentorial lesion; (e) ipsilateral superior cerebellar peduncle atrophy, contralateral rubral degeneration, contralateral inferior olivary degeneration and ipsilateral cerebellar atrophy after dentate nucleus hemorrhage; (f) ipsilateral inferior olivary degeneration after pontine tegmentum hemorrhage; (g) bilateral wallerian degeneration of the pontocerebellar tracts after ventromedial pontine infarction or basis pontis hemorrhage; and (h) ipsilateral cerebellar atrophy after middle cerebellar peduncle hemorrhage.
authors.affiliation: Department of Radiology, Saga Medical School, 5-1-1 Nabeshima, Saga, 849-8501, Japan. uchino@cc.saga-u.ac.jp
authors.forename: A
authors.initials: A
authors.lastname: Uchino
authors.forename: Y
authors.initials: Y
authors.lastname: Takase
authors.forename: K
authors.initials: K
authors.lastname: Nomiyama
authors.forename: R
authors.initials: R
authors.lastname: Egashira
authors.forename: S
authors.initials: S
authors.lastname: Kudo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001933:Brain Stem / Q000473:pathology*; D002531:Cerebellum / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D020521:Stroke / Q000473:pathology*