Yes Joe......This is correct!!
When csf fluid is blocked and backs up, it causes pressure on the cranium, bringing about, headaches, equilibrium problems; eventually seizures and probably death. This condition is more commonly referred to as "hydrocephalus" or, "water on the brain".
My bout with hydrocephalus was brought on by a huge A.N.tumor blocking the flow of fluid through a ventricle, which compunded an already bad equilibrium problem.
Consequently, the doctors felt that I had to have a shunt installed before the tumor was removed. I had to have two shunt surgeries because the first one had somehow become dislodged over night in the hospital. The next morning I was rushed back into surgery to have the first one removed and a new one installed. They tell me it's in permanently. It doesn't really bother me at all but it just feels and even looks a bit awkward having this balloon-like, collapsible ridge on the top of my forehead with a catheter cemented into my skull on one end and the other snaking across the side of my skull, down the side of my neck, across my chest - beneath the skin of course - and into my abdoman. It kind of makes you want to go around with a crash helmet on all the time. I'm extra vigilant about not bumping my head anymore.
Messing around with csf can be very dangerous because it is through the contamination of csf that Meningitis can be contracted. I remember while being in the hospital they wanted to check my csf. A doctor came in and punctured the shunt under the skin in my head. I remember all this brown liquid running down my face. I'm lucky I didn't get Meningitis! It was bad enough that I got M.R.S.A. while I was in!
I remember back in the early sixties, my cousin, who was an infant child at the time, had hydrocephalus and had a shunt installed. Today she is a healthy, vibrant mother in her forties - she resembles the actress Stockard Channing. She still has the shunt in even though it has long since stopped working. At a recent family get together, I rubbed my hand over her scalp and sure enough, it's still there.
Take care, Paul (the Borg)