Depression
Depression
Depression is classifi ed as a mood disorder, of which there are several subgroups. Major depression, or unipolar disorder, is a chemical defi cit within the brain, and a precise diagnosis is based on biologic factors or personal characteristics. Th e causes of depression include genetic and psychosocial stressors. Depression may also occur as a reactive episode, a response to a life event, or secondarily to many systemic disorders (including cancer, diabetes, heart failure, and AIDS). Th is condition is a common problem, and many patients with milder forms may be misdiagnosed and not receive treatment.