Simply that certain brain waves correlate with some definition of awareness of your surroundings.
I'd imagine its pretty hard to be certain that a brain-dead person can't perceive his or her surroundings, however.
I'd imagine its pretty hard to be certain that a brain-dead person can't perceive his or her surroundings, however.
Consider how we can feel physical sensations in dreams without any physical source, or “phantom limbs” that amputees are sometimes said to feel.
Could you find a link perhaps? I Googled the end of what I just quoted but didn't find anything...