SEASONAL AFFECTIVE  DISORDER OR SAD... SEASONAL AFFECTIVE DISORDER, OR SAD, IS A MOOD DISORDER CHARACTERIZED BY DEPRESSION RELATED TO A CERTAIN SEASON OF THE YEAR -- ESPECIALLY WINTER. HOWEVER, SAD IS OFTEN NOT DESCRIBED AS A SEPARATE MOOD DISORDER BUT AS A "SPECIFIER," REFERRING TO THE SEASONAL PATTERN OF MAJOR DEPRESSIVE EPISODES THAT CAN OCCUR WITHIN MAJOR DEPRESSION AND MANIC DEPRESSION. HELEN WOODRIF IS A CLINICIAN AT SINNISIPPI CENTER AND SHE TALKS WITH US ABOUT SAD ON THIS WEEKS EDDITION OF COMMUNITY HIGHLIGHTS...