The abnormal APOE e4 gene is the most widely known risk factor for __________

An experimental animal exhibits no fear or rage responses no matter what the provocation or situation. What do you believe happened to this animal?

a) A seizure destroyed the temporal lobes. b) The amygdala was destroyed by a tumor or was surgically removed. c) Excessive growth of dendrites disrupted connections within the cortex. d) The animal lost the ability to store memories so it does not react as it might have in the past.

Dorothy, a Connecticut homemaker, disappeared after her husband and children were killed in a car accident. Four months later, she was found in Mobile, Alabama, working as a waitress. Dorothy claimed that her name was Abby, which was her daughter's name, and that she did not know anyone by the name of Dorothy. Even after being positively identified by family members, Dorothy continued to insist that her name was Abby. Dorothy is most likely suffering from

a. a dissociative fugue disorder. b. a bipolar disorder. c. schizophrenia. d. a conversion disorder.