Seasonal affective disorder in the southern hemisphere

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Abstract
To determine whether seasonal affective disorder exists in the southern hemisphere and whether there is any seasonal specificity in phenomenology, the authors compared 23 subjects who reported a winter/autumn affective disorder, consistent with earlier definitions of the syndrome, with 22 subjects who reported a spring/summer affective disorder. The subjects with winter/autumn onset were characterized by increased appetite, carbohydrate craving, and increased sleep; those with spring/summer onset reported decreased sleep and decreased appetite. Hypotheses concerning the etiology of seasonal affective disorder are discussed.

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