confusion

CONFUSION
Disorientation; Thinking – unclear; Thoughts – cloudy

Definition

Confusion is the inability to think with your usual speed or clarity, including feeling disoriented and having difficulty paying attention, remembering, and making decisions.

Considerations

Confusion may come on quickly or slowly over time, depending on the cause. Many times, confusion is temporary. Other times it is permanent and not curable.

Confusion is more common in the elderly, and often occurs during a hospital stay.

Some confused people may act aggressively.

Source:
http://www.nlm.nih.gov/medlineplus/ency/article/003205.htm