psychology

Symptoms of post-traumatic stress disorder can develop in adults even with no explicit memory of an early childhood trauma, UCLA psychologists report Aug. 15 in the journal Biological Psychiatry.

Taking advantage of the recent dramatic advances in neuroscience, the authors write, could lead to new and improved psychological treatments.

A team led by UCLA researchers found that the brain's response to viewing sexual images is related to the number of sex partners a person has had in the previous year.