I want to know have braindead people came back to life. I don't know that they can. Different from legal and clinical death brain death can be a last sigh on wether a person is alive or not. The reason I want to know is cause one of my family members has fallen into a comma and is on life support. Psychitrist came in with a machine hooked it to her head and said she had no brain function. The brain seems to be the residence of the qauntam consciousness. How it connects to the brain and makes impulses I have no idea. Also I'm hearing that the brain uses the most energy? Is that possible that the brain could use more calories than any organ the body? I mean if that were the case couldn't we think instead of exercising?