What is Seasonal Affective Disorder?
When the weather is sunny and bright people tend to feel more upbeat and positive. When the weather is gloomy, cold and dismal, moods tend to slump and often people feel a little down.
However, for certain individuals these mood shifts develop into a type of depression that accompanies seasonal changes and affects their ability to function normally. Recurrent episodes of clinical depression that surface during seasonal changes, particularly winter, are referred to as Seasonal Affective Disorder (SAD).
This condition is caused by a biochemical imbalance in the hypothalamus – the part of the brain that governs the primary functions of the body such as appetite, temperature, sleep, sex drive, mood and activity.
The hypothalamus is stimulated by natural light entering the eye and striking the retina. When the days are short and sunlight is reduced, the hypothalamus has to adjust its response to the various body mechanisms, slowing down these functions.
Tags: Seasonal Affective Disorder
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