A coma is a deep state of unconsciousness It can happen as a result of a traumatic accident, such as a blow to the head, or a medical condition, for example, some types of infectionDr Bennett Machanic answered 52 years experience NeurologyThis does not, however, mean that a person is conscious Most patients who awaken from a coma soon recuperate But a minority will succumb to brain death;
Review Article British Journal Of Medical Practitioners
