ment except when vigorously stimulated to brief
arousal. Stupor is very near COMAon the scale of
CONSCIOUSNESS. Stupor may result from numerous
circumstances, including HYPOGLYCEMIA(low BLOOD
GLUCOSElevel), INTOXICATION, HYPOXIA(lack of oxy-
gen), injury (TRAUMATIC BRAIN INJURY[TBI] orCON-
CUSSION), ENCEPHALOPATHY, seizures, DRUGoverdose,
and poisoning. Because some causes of stupor are
potentially lethal, doctors attempt to identify them
quickly. Treatment depends on underlying cause.
See also PERSISTENT VEGETATIVE STATE;SEIZURE DIS-
ORDERS; UNCONSCIOUSNESS.stupor 285