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Search by topic:   13165. SEASONAL AFFECTIVE DISORDER (SAD). The Influence of Physical Environment on Human Psychology. This paper explores the physical environment-human psychology relationship through an examination of Seasonal Affective Disorder (SAD). Following a review of the literature on the relationship between seasonality and psychiatric disorders which helped to spur the initial clinical research on the problem of SAD, the main part of the paper provides a thorough overview of SAD, including its clinical features and major symptoms, the natural course of the illness, its distinction from other affective disorders, its epidemiology, and a discussion of treatment options with special attention to light therapy. The final section looks at the main theories of etiology in SAD, considering the role of photoperiod, melatonin, and circadian rhythms and the validity of each theory. 34p., 107f., 33b.   $133 Copyright 2002 Academic Research Papers Associate Term Paper Sites: Academic Research Papers Academic-Research-Papers Research Central Term Paper Assistance