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Discuss biological explanation of depression. (25 marks) In order for depression to be diagnosed the person needs to show at least five of these symptoms everyday for a minimum of two weeks. These clinical characteristics for depression can be emotional symptoms; this can involve sadness, melancholy, self-involvement, guilt and even thoughts of suicide. Another characteristic could be a lack of motivation including passivity, loss of interest and energy. The person could also have cognitive problems such as thoughts of hopelessness, pessimism and lack of self-esteem. Finally there can be somatic symptoms such as loss or increase of appetite and weight, and sleep disturbances. Depression is a mood disorder which can have different variations; Unipolar disorder is most common and most severe form of depression and bipolar disorder is where the condition occurs in episodes of depression, periods of normality and periods of mania. This can be caused genetics which can predispose...

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