I'm glad you posted these I had fun reading them and following some other links in them.
The biggest difference here is that they are talking about hydrocephalus or water on the brain and what causes this. In some cases there had been a problem with some venous obstruction that was preventing the fluid in the ventricles--the CSF--- from circulating like it should and it built up. This is similar to the problem seen in DAVF--veins so fat and big they actually stop something else from funcitonin correctly, thouhg in the case of DAVF itis not the ventricles and CSF drainage it s spinal cord funciton.
But hydrocephalus people are profoundly ill and they need a shunt to make it so the excess fluid in their brain can drain away . It sometimes goes to the peritoneum (stomach) and sometimes to the jugular where the fluid can retunr to circulation safely without pressing on the brain any more.
It is also hard for the researchers to be sure any thing they see in regards to the venous system is not a holdover finding from the hydrocephalus, in other words is the seeming high pressure coming from the venous system or is it coming from the hydrocephalus? Apparently some researchers a decade ago thought it was always initated by an increase in venous pressure but they retracted that finding after all becasue it turns out they were not testing the venous ressure but the fluid pressure instead.
the brain volume is the total of blood in the veins and ateries, the parenchyma (brain tissue) and the fluid in the ventricles. This has to remain constant in relation to each other because your skull is a limited size and you cant' tolerate extra stuff in there or the brain gets squished and you get developmental delays, which is what happens in hydrocephalus, the brain gets so squished it ends up with retardation.
Here's a cool abstract I found on one of these links
HERE IS PAPER
about inflammation and how it both helps and hurts the brain when an injury results in inflammation after the fact.
ANd another one just on the venous system in the head all around and it is a complete paper
thanks for the links they were interesting material
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