Carotid artery occlusion causes reversible brain damage in rat.
Indian Heart J
;
1994 May-Jun; 46(3): 171-5
Article
in English
| IMSEAR
| ID: sea-5349
ABSTRACT
In order to assess the density and distribution of brain damage after pure focal ischemia uncomplicated by hypotension or hypoxia, ischemia was produced by occlusion of one and/or both common carotid arteries (CCA) temporarily or permanently in the rat, followed by 3 months recovery. The brains were perfusion-fixed with formaldehyde, embedded in paraffin, subserially sectioned, and stained with hematoxylin-eosin/cresyl violet. Mild ipsilateral neuronal damage was observed after unilateral permanent occlusion, but confined only to the hippocampus. Damage of neocortical neurons began to appear after 1 day following bilateral permanent occlusion. Damage was worst over the superolateral convexity of both hemispheres, CA 4 and subiculur neurons; subsequently other sectors of hippocampus and other brain structures were affected. Some damaged neurons in the superficial cortex and CA 1 sector of hippocampus, and almost all in the other regions of brain reverted to normal profile by 3 months of recovery. All brain structures showed normal profiles, except a relative neuronal rarefication in neocortex and CA 1 sector of hippocampus after 3 months of recovery. These results suggests that only CCA occlusion causes partial/incomplete ischemia in the rat brain, where damaging effects are counterbalanced by metabolic and circulatory adjustments.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Rats
/
Time Factors
/
Brain
/
Male
/
Brain Ischemia
/
Carotid Stenosis
/
Rats, Wistar
/
Carotid Artery, Common
/
Electroencephalography
/
Animals
Type of study:
Etiology study
Language:
English
Journal:
Indian heart j
Year:
1994
Type:
Article
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