What role does serotonin play in Seasonal Affective Disorder?

Serotonin is a neurotransmitter that has a profound influence on mood regulation. In the context of Seasonal Affective Disorder (SAD), which is a type of depression that occurs at specific times of the year, typically during the winter months when there is less natural sunlight, serotonin levels can be significantly impacted.

The decrease in sunlight exposure during certain seasons can lead to a drop in serotonin levels, which is associated with feelings of sadness and depression. Individuals with SAD often experience an improvement in mood when they are exposed to bright light, which helps to increase serotonin production. This connection highlights the role of serotonin in mood regulation and its importance in the development and treatment of Seasonal Affective Disorder.

While serotonin influences various other physiological functions, its primary relevance to SAD is its direct impact on mood, making it the focus when understanding the psychological implications of this disorder.