This article from the Health Section of the NY Times essentially outlines the previously unadmitted limits of diagnosis when looking at unresponsive patients.[1] Something to consider before you go and write that living will.
- Mr. Benedict Carey. "Vegetative Patient Shows Signs of Awareness, Study Says" NY Times (online) 2006-09-07 http://www.nytimes.com/2006/09/07/health/07cnd-brain.html?ex=1315281600&en=a3935305b1d8ece1&ei=5088&partner=rssnyt&emc=rss