It is estimated that 1 in 6 veterans of the wars in iraq and afghanistan will develop symptoms of: depression, anxiety, posttraumatic stress disorder, all of the answers are correct. Patients with posttraumatic stress disorder (ptsd) have been found to have reduced volume in the: hippocampus. frontal cortex, parietal cortex, both the hippocampus and the frontal cortex. Ans: d page: 566 topic: research focus 16-1: posttraumatic stress disorder. The region of the brain that resembles what sigmund freud called the superego is: the frontal cortex. the cortex. the limbic system. the temporal cortex. Ans: a page: 567 topic: introduction diff: medium. The region of the brain that resembles what sigmund freud called the id is: the frontal cortex the cortex. the limbic system. the temporal cortex. Ans: c page: 567 topic introduction diff: medium. Huntington"s disease is first caused by: a genetic error, progressive cell death, rapid cell death. loss of neural connections.