Definition: Deposits of the protein beta-amyloid that accumulate in the spaces between nerve cells. Plaques interfere with the nerve cells' ability to communicate with each other and perform important brain functions. Plaques, along with neurofibrillary tangles, are a hallmark of Alzheimer's disease.
Plaques
From Carrie Hill, PhD, former About.com Guide
Updated: March 04, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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