For more than 6 percent of the population snow, snow man and skating not launch a winter story, and the gloomy mood that can only be okay with the arrival of spring. Seasonal emotional disorder (SED) is a form of clinical depression with atypical symptoms – increased feelings of fatigue, increased appetite, irritability, feelings of hopelessness, lethargy and lack of interest in doing everyday activities. Symptoms are exacerbated in December and continue until late spring, summer fade and return again in the winter. Seasonal depression is different from typical depression in that it depends on the calendar. Also – unlike the standard form – patients with SED reluctant to suicide and lethargic, and not nervous. This condition affects mostly young men and women of childbearing age, although it is not clear why. SED with women more than men with SED in 4:1 ratio. SED rarely occurs in women at menopause, which gives rise to the experts believe that hormonal changes play a role in the pathophysiology. Although physicians have an understanding about the peculiarities of SED, yet little is known about how and why these features occur. Biology is still very strange, “said Dr. Douglas Jacobs, a professor of clinical psychiatry at Harvard. He says a leading theory on the problem that the reduction of sunlight in winter, probably affects neurotransmitters melatonin and serotonin.
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