Normal pressure hydrocephalus

Facts About Other Dementias

Not everyone who shows signs of dementia has Alzheimer’s disease. Dementia is an umbrella term that covers many separate diseases. It is a general term for loss of memory and other mental abilities severe enough to interfere with daily life. Therefore, dementia is not a disease; it is a syndrome, or group of symptoms, associated with many separate underlying diseases. There are over 20 different types of dementing diseases but the most common is Alzheimer’s, accounting for 60-80 percent of the cases. Individuals may have more than one type of dementia.

Normal pressure hydrocephalus

A specific form of hydrocephalus in which the central cavities of the inner brain (the ventricles) enlarge at the expense of the substance of the brain, while the pressure of the CSF remains within normal range. Normal pressure hydrocephalus (NPH) is due usually to a gradual blockage of the drainage pathways for cerebrospinal fluid (CSF) in the brain. NPH can occur as a complication of brain infection or hemorrhage. The word “hydrocephalus” in Greek literally means “watery head.”

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