Delirium

An acute disorder of attention and cognition. Also referred to as acute confusional state.

Reference:
Inouye, S. K., Van Dyck, C. H., Alessi, C. A., Balkin, S., Siegal, A. P., & Horwitz, R. I. (1990). Clarifying confusion: the confusion assessment method: a new method for detection of delirium. Annals of Internal Medicine, 113(12), 941-948. doi: 10.7326/0003-4819-113-12-941