It’s difficult to imagine a more nightmarish scenario—to be paralyzed in a hospital bed, unable to speak or communicate, presumed “decerebrated” and brain dead, limbless, blind, deaf, only able to move your head a few inches (which the doctors interpret as an involuntary reflex)... http://366weirdmovies.com/42-johnny-got-his-gun-1971/
I was in that "nightmarish scenario."
When I opened my eyes after the coma, I could not move (no arms or legs that worked). I could not talk. All I could do was open my eyes and watch.
Maybe a few days later, I could turn my head.
It had been explained to me that a blood clot in my head could not be removed. It hadn't burst, as these things usually do. It had leaked, causing a major brain bleed. I had been in a coma. Now that my eyes were open, I could partly see (my vision was limited). My vision was poor, but I could hear. I could hear I was a vegetable.
I turned my head from side to side as fast as I could. I shook my head. Doctors wanted me to keep my head still. I would dislodge that blood clot. It could finish what it started. Movement wasn't an involuntary reflex. It was purposeful. (This behavior didn't last long, and yes it was a behavior. It responded to a particular behavior medication I was familiar with as a Behavior Specialist. A reflex would need a different medication.)