Depression is a general lowering or reduction, for example of mood, activity, or functionality:

Psychology and mood

·         Depression (personality), a personality facet in Revised NEO Personality Inventory.

·         Depression (mood), a common term for a sad or low mood or emotional state, or the loss of pleasure

·         Clinical depression, or major depressive disorder, a clinical term for a state of intense sadness, melancholia or despair that has advanced to the point of being disruptive to an individual's social functioning and/or activities of daily living. Subtypes of clinical depression:

·         Melancholic depression, characterized by the inability to find pleasure in positive things combined with physical agitation, insomnia, or decreased appetite

·         Atypical depression, a common long term cyclical form of depression in which the individual can feel enjoyment, eat, and sleep, but there is significant lethargy, a 'leaden' feeling, and a strong response to rejection-related issues

·         Psychotic depression, in which clinical depression co-exists with psychotic or delusional perceptions

·         Postnatal depression, depression following childbirth. Also known as 'Postpartum depression' or, usually when less severe, 'maternity blues' or 'baby blues'

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