Exploring the enigmas of frontal lobe dysfunction.

The clues vary, and many of the "typical" signs are misleading or even contradictory. One patient acts impetuously while another seems to have lost his spontaneity. Still another shows aggressive, animalistic behavior--or becomes apathetic, perhaps curling up in the fetal position or sucking, rooting, or grasping as an infant does. Some patients can… (More)