Bipolar disorder

Mood" is defined as a ubiquitous and sustained feeling or emotion that dominates a person’s behavior and affects his perception. Mood disorders also known as affective disorders include unipolar and bipolar disorders. Manic-depressive disorder--more contemporarily identified as bipolar disorder (BD)--is a chronic and complex disorder of mood that is characterized by a combination of manic, hypomanic, and depressive episodes, with subsyndromal symptoms extant in between the mood episodes. It is one of the leading causes of worldwide disability and morbidity.