Delirium is a syndrome, or group of symptoms, caused by a disturbance in the normal functioning of the brain. The delirious patient has a reduced awareness of and responsiveness to the environment
Differences Between Delirium and Dementia*
Feature
Delirium
Dementia
Onset
Sudden, with a definite beginning point
Slow and gradal, with an uncertain beginning point
Duration
Days to weeks,...
Feet are usually written as ', and the symbol is also used to denote arcminutes.
Prime units of any type will also be marked in such a manner, as are minutes of angle and time.