Seasonal affective disorder

Seasonal affective disorder, or SAD, is an affective, or mood disorder. Most SAD sufferers experience normal mental health throughout most of the year, but experience depressive symptoms in the winter. SAD is rare, if existent at all, in the tropics, but is measurably present at latitudes of 30°N (or S) and higher.

Related Topics:
Affective - Mood - Disorder - Depressive - Winter - Tropics

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