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biological

Judged: two independent readers; copy check clear.

coma

coma Coma is a deep state of unconsciousness in which a person cannot be awakened, linked to markedly reduced brain activity.

Coma is a deep state of unconsciousness in which a person cannot be awakened, linked to markedly reduced brain activity. It generally occurs when both cerebral hemispheres or the brain stem reticular formation are injured or not functioning properly.