what is coma???

A deep state of unconsciousness from which a person cannot be awakened by such stimuli as loud noises, bright lights, or even pinpricks is called a coma. Coma is usually caused by a widespread injury to either side of the brain or to the upper brain stem. Coma may result from a number of metabolic disorders or from physical injuries to the brain from disease or trauma.

Coma is a state of unconsciousness, characterised by loss of reaction to external stimuli and absence of spontaneous nervous activity, usually associated with injury to the cerebrum. Coma may accompany a number of metabolic disorders or physical injuries to the brain from disease or trauma.

Coma is a deep, heavy sleep.There may be permanent damage to the brain and nervous system.

Coma is a sleeplike state of unconsciousness caused by disease, injury, or poison.

The head of a comet made up of a cloud of gas and dust and usually containing a nucleus is called coma.

A state of mental or physical sluggishness is called Coma.