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Article: Major depressive disorder
- Article from:
- Gale Encyclopedia of Mental Disorders
- Author:
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Major depressive disorder
Definition
Major depressive disorder (MDD) is a condition characterized by a long-lasting depressed mood or marked loss of interest or pleasure (anhedonia) in all or nearly all activities. Children and adolescents with MDD may be irritable instead of sad. These symptoms, along with others described below, must be sufficiently severe to interfere significantly with the patient's daily functioning in order for a person to be diagnosed with MDD.
Description
Major depressive disorder is a serious mental disorder that profoundly affects an individual's quality of life. Unlike normal bereavement or an occasional episode of "the blues," MDD causes a lengthy period ...