Stroke, Vol 15, 558-562, Copyright © 1984 by American Heart Association
BT Volpe, WA Pulsinelli, J Tribuna and HP Davis
Rats subjected to transient forebrain ischemic injury by the method of four
vessel occlusion (4-VO) develop irreversible injury to select populations
of vulnerable neurons which include pyramidal cells in the CA-1 region of
the hippocampus. This brain area is thought to be crucial for learning and
memory. Rats subjected to 30 minutes of 4-VO, and then cerebral reperfusion
were tested on a radial 8-arm maze task after they had recovered. The data
shows that both 4-VO and control animals improve their performance over
trials, but that 4-VO rats are impaired on "working" and "reference" tasks.
The data suggest that 4-VO rats' impaired "working" performance is
permanent, compared to their transient "reference" impairment. Alterations
in sensorimotor activity could not account for these performance deficits
since control and 4-VO rats demonstrated equivalent choice time per maze
arm. Performance deficits in rats following forebrain ischemic injury may
be similar to some of the cognitive deficits found in humans survivors of
cerebral hypoxia-ischemia.
ARTICLES
Behavioral performance of rats following transient forebrain ischemia
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