Experimental cerebral ischemia in mongolian gerbils. I. Light microscopic observations.

Acta Neuropathologica
U ItoI Klatzo

Abstract

Light microscopic observations were carried out on Mongolian gerbils (Meriones unguiculatus) subjected to a partial cerebral ischemia by occlusion of the left common carotid artery at the neck. About 30% of gerbils developed an ischemic injury in the ipsilateral hemisphere and their brains revealed the following histopathologic features: 1. the changes were related to the intensity (duration) of the ischemic insult and to the time elapsed following release of the occlusion. The ischemic lesions appear to progress after re-establishment of the circulation and this presents one facet of a "maturation" phenomenon which seems to be a general principle applicable to various parameters of ischemic injury. The rate of "maturation" of the lesions is related to the intensity of the ischemic insult, a lesser intensity resulting in longer development of lesions. 2. The changes were either focal or diffuse in character. The former were assumed to be directly related to a vascular involvement; among the latter the topistic distribution of the hippocampal changes suggested a feature of selective vulnerability. 3. An indirect indication of neuronal recovery was surmised from observations on animals sacrificed after different periods following...Continue Reading

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