Stupor is the lack of critical cognitive function and level of consciousness wherein a sufferer is almost entirely unresponsive and only responds to base stimuli such as pain. The word derives from the Latin stupure, meaning insensible. Being characterised by impairments of reactions to external stimuli, it usually appears in infectious diseases, complicated toxic states, severe hypothermia, mental illnesses (for example schizophrenia, severe clinical depression), vascular illnesses (for exampl… (More on Stupor)