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A major depressive episode is a period characterized by the symptoms of major depressive disorder: primarily severely depressed mood and a loss of interest or pleasure in everyday activities, accompanied by other symptoms such as feelings of emptiness, hopelessness, anxiety, worthlessness, guilt and/or irritability, changes in appetite, problems concentrating, remembering details or making decisions, and thoughts of or attempts at suicide. Insomnia or hypersomnia, aches, pains, or digestive problems that are resistant to treatment may also be present. The description has been formalised in psychiatric diagnostic criteria such as the DSM-IV and ICD-10〔Diagnostic and Statistical Manual of Mental Disorders, fourth Edition.〕 Significant emotional pain and economic costs are associated with depression. In the United States and Canada, the costs associated with major depression are comparable to those related to heart disease, diabetes, and back problems and are greater than the costs of hypertension.〔(Medscape ) 〕 According to the Nordic Journal of Psychiatry, there is a direct correlation between major depressive episode and unemployment. Treatments for a major depressive episode include psychotherapy and antidepressants, although in more serious cases, hospitalization or intensive outpatient treatment may be required.〔 Depressive disorders are illnesses in the brain. There are many theories as to how depression occurs. One interpretation is that neurotransmitters in the brain are out of balance, and this results in feelings of worthlessness and despair. Magnetic resonance imaging shows that brains of people who have depression look different than the brains of people not exhibiting signs of depression. Depression can also be inherited through genetics. A family history of depression increases the chance of being diagnosed. ==Symptoms== The criteria below are based on the formal DSM-IV criteria for a major depressive episode. A diagnosis of major depressive episode requires that the patient has—over a two-week period—experienced five or more of the symptoms below, and these must be outside the patient's normal behaviour. Either depressed mood or decreased interest or pleasure must be one of the five (although both are frequently present). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Major depressive episode」の詳細全文を読む スポンサード リンク
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