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Coma and Persistent Vegetative State

What Is It? Coma is a deep and prolonged state of unconsciousness resulting from disease, injury or poisoning. The word coma usually refers to the state in which a person appears to be asleep but cannot be awakened. Persistent vegetative state refers to another form of altered consciousness in which the person appears to be awake but does not respond meaningfully to the outside world. In this condition, the person's eyes may be…

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