After Spock is shot and they rendezvous with McCoy and beam out, there is an error in the 'optical.' Not all of the equipment 'sparkles' with the beam out - one piece just dissolves, clearly missed by the technicians in post-production. See more
Don't let these low panel readings bother you. I've seen this before in Vulcans. It's their way of concentrating all their strength, blood and antibodies onto the injured organs - a form of self-induced hypnosis.
You mean he's conscious?
Well, in a sense. He knows we're here and what we're saying, but he can't afford to take his mind from the tissue he's fighting to heal. I suppose he even knows you were holding his hand.
A good nurse always treats her patients that way. It proves ...