Biondi ring tangles in the choroid plexus of Alzheimer's disease and normal aging brains: a quantitative study.


The choroid plexus (CP) performs the vital function of producing up to 90% (450-1000 ml/day) of cerebrospinal fluid (CSF) to nourish and to protect the brain in the CSF suspension. The CP also acts as a selective barrier between blood and CSF to regulate ions and other essential molecules. However, the accumulation of intracellular inclusions called Biondi… (More)


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