Normal pressure hydrocephalus (NPH) is an abnormal buildup of cerebrospinal fluid (CSF) in the brain's ventricles, or cavities. Normal pressure hydrocephalus (NPH) is a brain disorder in which excess cerebrospinal fluid (CSF) accumulates in the brain's ventricles, causing thinking and. Normal pressure hydrocephalus (NPH) is an accumulation of cerebrospinal fluid (CSF) that causes the ventricles in the brain to become enlarged, sometimes. What Is Normal Pressure Hydrocephalus? Normal pressure hydrocephalus (NPH ) is a condition that happens when you have too much of a. Normal pressure hydrocephalus (NPH) is a condition that is caused by an abnormal build up of cerebrospinal fluid in the ventricles (cavities or. What are the symptoms of normal pressure hydrocephalus? These are possible symptoms of NPH: Trouble walking (feels like the feet are stuck to the ground).