Coma

[contentuser]

Overview

A coma is a deep state of unconsciousness, during which an individual is not able to react to his or her environment. Someone in a coma cannot consciously respond to stimulation. Coma can be caused by an underlying illness, or it can result from head trauma. A comatose person is still very much alive, but he or she is not simply asleep. The brain wave activity in a comatose person is very different from that of a sleeping person; you can wake up a sleeping person, you can't wake a pe...Read the full article