Hydrocephalus is a condition of an excessive fluid collection in the brain. Normally, the ventricles of the adult brain contain approximately 25 ml of cerebrosp-inal fluid, and an increase in this amount may be pathologic. There are situations in which hydrocepha-lus ex vacuo—excessive fluid that simply replaces lost brain tissue—may be of little consequence or even normal, but hydrocephalus that compromises brain function is clinically significant. The reason for this is primarily the effect of excess fluid on the cerebral white matter that surrounds the lateral ventricles.

All About Alzheimers

All About Alzheimers

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