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Essay / Research Paper Abstract
This 3 page paper looks at the higher prevalence of SAD in Nordic countries and the research which has sought to explain the higher incidence level. The hypotheses of latitude and genetic inheritance are considered in the context general research as well as research focusing on the Nordic countries. The bibliography cites 8 sources.
Page Count:
3 pages (~225 words per page)
File: TS14_TESADnor.rtf
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Unformatted sample text from the term paper:
prevalence in Nordic countries compared to other areas such as Europe. The rate of prevalence in the artic circle has been measured at 9.5% and has been estimated as being
as high as 20% within the Nordic countries (Avery et al, 2001). Stuhlmiller (1998) in a qualitative study of 28 subjects notes
that there does appear to be a higher level of prominence of SAD in Northern Norway with significant physiological changes associated with seasonality and the changing patterns of light and
dark. There was also evidence of psychological changes as a result of the seasonal changes and associated this with the latitude of the area but there is still some controversy
regarding the causes due to some inconsistent results (Stuhlmiller, 1998). The association of SAD with different light patterns and increased prevalence during the days where there is less sunlight
is the basis of the condition with onset usually occurring during the fall and carrying throughout the winter. This link to the change in light as a seasonal phenomenon may
also be used to support the idea that there is a greater prevalence in areas such as the Nordic countries due to the increased distance from the equator. In Studies
in North America Rosenthal (1983) observed a prevalence in the winter of 1.4% in Florida compared to the rate in North Hampshire, which was 9.4%, the latter being further
from the equator. Potkin (1986) also put forward the hypotheses of sad being impacted by latitude and found that it was more prominent in Northern latitudes, this has becomes an
idea that has been taken up in many studies and may explain the occurrence in the Nordoic countries. There have been a number of different studies in Scandinavia
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