Stupor

Stupor is a medical condition of severely diminished consciousness in which an affected person is almost entirely unresponsive and reacts only to intense stimuli such as pain, lacking critical mental function at a normal level of consciousness. Affected individuals typically remain rigid and mute while their eyes stay open and may track objects nearby, appearing to be in a prolonged sleep-like state without external stimulation; in severe cases linked to depression, patients can become completely motionless, lose their appetite and stop speaking entirely. The condition can stem from a wide range of underlying problems, including infections and toxins such as heavy metal poisoning, neurological disorders like schizophrenia, epilepsy, dementia and Alzheimer's disease, physical causes such as severe hypothermia or vitamin B12 deficiency, vascular problems such as hypertensive encephalopathy, structural brain problems such as tumors or trauma, and psychiatric conditions including major depression and acute stress reaction; damage to the brainstem's reticular activating system, particularly at the level of the pons, is also associated with stuporous states. Treatment focuses on identifying and addressing the underlying cause rather than the stupor itself.