I don't think that's physically possible. It could shrink some, it could be surgically removed, it could be sucked out by alien beings but the cerebral cortex would not simply dissolve into nothingness.
If you wish to keep promoting what appears to be nothing more than a canard show us in some sound medical literature that brain tissue can disappear. Then show us Terri's brian scan not one of Felos' liar-for-hire's reports. Then tell us what difference the brain scan makes when the subject in question obviously tries very hard to respond to people and things around her.
Here are a couple of quotes from the Schindler's experts...
Dr. William Maxfield, a Tampa radiologist, agreed that Terri is not in a persistent vegetative state, noting her ability to follow commands and her responsiveness, according to the AP. After comparing Terri's 1996 CAT scan to her 2002 scan, Maxfield also testified that Terri's brain tissue appeared more localized and uniform.
"It tells me that the brain tissue on the [2002] study has a more normal appearance," Maxfield testified, adding that hyperbaric oxygen therapy, similar to Hammesfahr's recommendation, could lead to improvement, the AP reported.
http://www.nrlc.org/news/2002/NRL11/shiavo.html
What are you basing your statements on? If it is court records please show where these doctors said different than what is quoted above.
A total of nine neurologists have also stated that Terri Schiavo is not in PVS. "It is obvious to me that Ms. Schiavo is a viable human being who is at least semi-responsive to her environment," physician Richard Neubauer stated in a May 2001 affidavit. Dr. Neubauer is a recognized expert in hyperbaric oxygen therapy, a type of treatment he believes might improve Terri's condition. "She is not brain dead nor is she in a persistent vegetative state."