Not an medical doctor so I can not answer that question.
It does seem to be the position of many doctors and the judge.I know there are other opinions.
Plenty of helpful stuff here
http://www.freerepublic.com/focus/f-news/1352657/posts?page=6392#6392
Don't let the sharks scare ya. The touchy subject is the PVS.
You said, "Not an MD, so I cannot answer that question."
Well, apparently, it is a subject of some debate between the doctors as well, so welcome to the club.
There is PVS- the doctor's hired by the guardian (Judge Greer) definition
Then the definition given in the Florida Statutes
Then the one accepted by those who think Terri is BRAINDEAD.
Then the one accepted by those who think she is NOT. Actually they cross a lot.
And none of that has anything to do with the Judge's latest decisions.