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What is the Cause of NPH?
Putting it all together
NPH is actually a form of hydrocephalus, an excessive amount of cerebro-spinal fluid (CSF) in the brain. The term hydrocephalus is derived from two Greek words: hydro for water and kephale for head. CSF is produced by structures called the choroid plexus and stored in cavities within the brain called ventricles. The function of CSF is to cushion the nerve structures and to provide nutrients to the central nervous system. In normal individuals, the production of CSF by the ventricles is balanced by absorption of CSF into the blood stream through structures called the arachnoid villi. Hydrocephalus refers to an imbalance in this production and absorption process. Left untreated, fluid accumulates in the ventricles causing them to enlarge. This swelling affects local nerve structures resulting in the symptoms associated with the NPH.
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