This month the American Psychiatric Association announced the names of “working group” members who will guide the development of the new Diagnostic and Statistical Manual of Mental Disorders, or DSM, the codex of American psychiatry.

WEDNESDAY, May 7 (HealthDay News) -- New treatments for a type of depression in the elderly related to blood vessels -- called vascular depression -- are under development, and researchers have discovered why some patients with this condition fail to respond to current medications.

Details of the findings were to be presented Wednesday during a news conference by researchers taking part in U.S. National Institute of Mental Health symposiums at the annual meeting of the American Psychiatric Association, in Washington, D.C.