Hardening or scarring of brain tissue, a degenerative condition that can result from injury, infection, or disease.
From Latin cerebrum (brain) + Greek sclero- (hard) + -osis (condition). The term combines medical terminology from the 19th century when doctors were cataloging brain pathologies.
Cerebrosclerosis is what happens when the brain's delicate tissue gets permanently scarred—it's like the difference between a clean scar on skin versus a thick, inflexible one; once the brain stiffens, function declines.
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