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What is S.A.D.?
Seasonal Affective Disorder is a medical term describing a type of depression brought on by a change in the availability of bright light as the year progresses from summer to winter. Specifically, it refers to depression caused by lack of enough bright light to trigger various hormones that effect the body's circadian rhythms. No one knows who will become depressed as a result of a lack of light, but many people experience mood changes as winter sets on. The severity of depression can range from mild winter blues to major S.A.D. Some people simply go to sunnier climates in the winter. Others put up with bad moods. Some are completely debilitated and unable to function. Many are only marginally aware of the seasonal aspect of their depression. However as more information is becoming readily available, many people are now beginning to notice how lack of light affects their mood. |
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