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Experimental focal cortical ischemic lesions consist of an ischemic core and a potentially salvageable peri‐ischemic region, the ischemic penumbra. The activity of neurons and astrocytes is assumed to be suppressed in the penumbra because the electrical function is interrupted, but this is incompletely elucidated. Most experimental stroke studies used young adult animals, whereas stroke is prevalent...
This article updates the Calcium Hypothesis of Alzheimer's disease and brain aging on the basis of emerging evidence since 1994 (The present article, with the subtitle “New evidence for a central role of Ca2+ in neurodegeneration,” includes three appendices that provide context and further explanations for the rationale for the revisions in the updated hypothesis—the three appendices are as follows:...
Mutations in presenilin (PS) proteins cause familial Alzheimer’s disease. We herein tested the hypothesis that the expression levels of PS proteins are differentially affected during healthy aging, in the absence of pathological mutations. We used a preclinical model for aging to identify associations between PS expression and quantitative behavioral parameters for spatial memory and learning and...
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