My wife is a drug rep and used to sell a drug that disables your muscles during the surgery. You may have read about people that have had that drug, cannot move, and then they were never given the medicine that knocks them out, and they are awake during the surgery, suffering as they are operated on. They cannot defend themselves because they cannot move. They do not give you this drug during this surgery. They stimulate your facing nerve during the surgery to determine that it is still working, and they need your facial muscles to move. Other than that, you are out BIG TIME.
I had a BAHA abutment implanted during my surgery, and it was closed over and not exposed. Three months later I had another surgery to expose the abutment and scalp the skull tissue around the abutment. I was given verset (sp) to knock me out, but I woke up during the surgery and spoke with the doctor and his staff of nurses...they were a little suprised. My scalp was so full of some drug that there was no pain. I think most people even get a BAHA just under a local, and never get knocked out like I did.
I have had several surgeries and every time I get put under, it feels like I just blinked my eyes and then woke up. There is no concept of time. It is not unpleasant and there is nothing to fear.
James