Borderline PVS imo who might slightly improve in a different environment and fresh air and stimulation. It's probably too late for any kind of therapy to reverse the physical effects of neglect, but not impossible. How about if you asked the question thusly, "If you ever became in an incapacitated state where you were unable to do anything but lie in bed all day and had people take care of you (you can tell them all the icky, humiliating stuff that would entail), who would you want to intervene to end your life, how would you want them to do it, and would it bother you if they afterward went to jail for it?
Nobody would *want* to live like that. Nobody would *choose* to live like that unless they were crazy. The problem is do we or anybody have the right to terminate their lives, whether or not they left a living will? Legally we do if they have a written directive; morally I'm no longer sure about that any more.
The Judeo-Christian ethic is thou shalt not kill. No exceptions. Anyone who does not subscribe to that ethical system has a constitutional right to devise and follow their own ethical system, within the constraints of the legal system in the particular state they land in when their incapcitation commences or where they may be taken to reside thereafter.
According to Pharmamom and her sources,
Diplomates and Fellows of the American Academy of Neurology state that a differential diagnosis for PVS must include an MRI and hours of neurologic testing--over the course of weeks. Of course, this is the opinion of a group of highly educated, expert DISINTERESTED neurologists, not the opinion of the husband's pet neurologists, one of whom is a member of a society which advocates euthanasia.