When we ask what are the causes of depression, the answers are divided into different branches like fractals and different answers are given for each section.
The answer is for researchers who continue to do research in this field; winter and summer with the changes in daily exposure to sunlight, and thus changes in secreted hormones.
With the gradual decrease in daylight exposure, the release of melatonin is increased and the individual feels more sleepy and less energy. At the same time, the family history of depression, the person's social life and the level of stress are also among the effective factors.
Biologically speaking, the changes in the amount of light transmitted to the brain as aware of the retina become unnoticed by the brain after a while, and the circadian rhythm is disturbed. The person continues his / her daily routine without normalizing the need for physiological sleep and normalizes this state. Of course, there are changes in the light transmission of the eye.
The question of why and how is not even clear in all of these. As we always say; every individual is unique.
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