Researches recently did an experiment that showed that mice living in a room that was lit 24 hours a day exhibited symptoms of depression. The mice who were kept on a normal light/dark cycle or with constant light but a dark tube to hide in did not experience the symptoms/as much of them as did the constant light mice.
This correlates to the increase in depressive disorders in humans as people are exposed to more light during the night that go against our natural sleep cycles.Our cycles are influenced by things like staying up at night to watch TV or going out to a lighted city, or working late...as more and more people are exposed to more light at night, depressive disorders may be more of a risk for everyone and their numbers will continue to rise.
Moral: make sure you get a good nights sleep!
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