Depression, a common mental disorder that involves a depressed mood or loss of pleasure or interest in activities for long periods of time, is often difficult for an individual experiencing it, and ...

Psychologist John Spiridigliozzi testified that he had diagnosed Chandler with recurring major depression and histrionic personality disorder in 1998. Closing arguments are expected Thursday ...

ADHD and bipolar disorder have some overlapping symptoms, which can make diagnosis difficult. But symptoms of ADHD tend to appear before the age of 12. Bipolar disorder may start later.