So I was wondering...
Any component of the human body decomposes when dead. In the body there are cleanup mechanisms in place to remove the dead cells before it putrefies and decomposes. If the cleanup mechanism fails it would be similar to gangrene.
But in PD, the brain volume does not change / reduce, according to the severity of the disease, which is indicative of dead brain cells.
For example, if 80% DA neurons are dead, and if it is occupying X amount of space, then 20% space should be occupied by the remaining neurons...
We now know that PD is not just DA neuronal death, but a whole system disease. So if the whole system is affected, why doesn't the volumes change?
Apologies if this is irrelevant.