Stroke, Vol 23, 328-332, Copyright © 1992 by American Heart Association
M Nakane, A Teraoka, R Asato and A Tamura
BACKGROUND AND PURPOSE: In rats, degeneration of the ipsilateral substantia
nigra occurs a few weeks after occlusion of the middle cerebral artery. The
aim of this study was to clarify whether similar change is observed in
stroke patients. METHODS: Eighteen patients with striatal infarction and
six patients with cortical infarction in the territory of the middle
cerebral artery were examined by means of sequential magnetic resonance
imaging. RESULTS: In all patients with striatal infarction, T2-weighted
images revealed a high-signal- intensity spot in the ipsilateral substantia
nigra. Changes in the ipsilateral substantial nigra appeared at day 14
after stroke on average and then became less intense and smaller a few
months after the stroke. By contrast, we observed no nigral changes in any
patient with cortical infarction. CONCLUSIONS: The degenerative change in
the ipsilateral substantia nigra initially found in the rat model similarly
occurred in patients with striatal infarction. This remote change in the
substantia nigra may represent magnetic resonance imaging detection of
neuropathologic changes in this region through the striatonigral pathway.
ARTICLES
Degeneration of the ipsilateral substantia nigra following cerebral infarction in the striatum
Department of Neurosurgery, Tokyo Metropolitan Bokuto Hospital, Japan.
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