Brought on by darkness, seasonal disorder needs light »
Posted By omerazam 9 months, 3 weeks ago in StyleA major biological signal tracking seasonal sunlight changes is melatonin, a brain chemical turned on by darkness and off by light. Wehr and Rosenthal found that the patients with seasonal depression had a longer duration of nocturnal melatonin secretion in the winter than in the summer, just as with other mammals with seasonal behavior.
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omerazam
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