Kelly Rohan: How does light therapy help treat seasonal depression?

How does light therapy help treat seasonal depression?

As winter approaches, shorter days spark a cascade of changes within the brains of animals. As a result, groundhogs retreat to their burrows for hibernation, weasels’ coats turn from brown to white, and birds cease their singing. And scientists are finding that seasonal behavioral changes similarly happen for some humans. Kelly Rohan digs into what we know about seasonal affective disorder. [Directed by Avi Ofer, narrated by Bethany Cutmore-Scott, music by Cem Misirlioglu].

Seasonal affective disorder, or SAD, affects about 1% of people, causing recurring depression during the darkest months. Like groundhogs hibernating and weasels changing color, some humans experience dramatic mood and energy changes as days grow shorter. Scientists suspect disruptions in circadian rhythms, such as prolonged melatonin release or shifted biological clocks, play a key role. Despite lingering mysteries, effective treatments like light therapy can help many regain their spark.

Winter Darkness Can Trigger Real Shifts In The Human Mind

As daylight shrinks in winter, not only do animals hibernate or change color, but human brains can also shift, triggering seasonal affective disorder. About 1% of people experience SAD, a recurring depressive condition that closely mirrors classic depression but cycles with the seasons. Scientists believe disturbances in circadian rhythms, such as longer melatonin release, may play a key role. Despite lingering mysteries, proven treatments like light therapy and talk therapy can restore brighter moods.