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A description of the condition opposite depression in manic-depressive psychosis, or bipolar disorder. It is characterized by a mood of elation without apparent reason.

Most episodes of mania—elation without reasonable cause or justification—are followed in short order by depression; together they represent the opposites described as bipolar disorder. Manic episodes are characterized by intense feelings of energy and enthusiasm, uncharacteristic self-confidence, continuous talking, and little need for sleep. People experiencing a manic period tend to make grandiose plans and maintain inflated beliefs about their own personal abilities. While manic people appear to be joyful...