Ataxia after pontine stroke: insights from pontocerebellar fibers in monkey.

Abstract:

:Basis pontis lacunes cause contralateral but rarely ipsilateral ataxia. We explored this phenomenon with isotope tract tracing in the rhesus monkey. Labeled pontocerebellar fibers cross midline and disperse widely in the opposite hemipons before coalescing in the brachium pontis. This anatomical arrangement suggests that small pontine strokes spare sufficient decussating pontocerebellar fibers to prevent ipsilateral dysmetria, and that ipsilateral dysmetria after large pontine stroke represents a disconnection syndrome.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Schmahmann JD,Rosene DL,Pandya DN

doi

10.1002/ana.20060

keywords:

subject

Has Abstract

pub_date

2004-04-01 00:00:00

pages

585-9

issue

4

eissn

0364-5134

issn

1531-8249

journal_volume

55

pub_type

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