Depression develops due to failure of circadian rhythm

The frequent lack of sleep at night because of work or hours at the computer is a threat to health.

Biologists at the Johns Hopkins University conducted a new study that showed that the night light emitted by the lamps, computers and iPad-mi, can cause depression. According to scientists, because of the artificial stress in the body can increase the stress hormone cortisol, which is responsible for depression and reduced learning.

To determine the effects of changes in the rhythm of light an experiment was conducted on mice, in which scientists were forced rodents to live in accordance with the seven-hour cycle with the separation of the "day" and "night" on a 3.5-hour periods. According Newstrack India, insomnia in mice due to this transition does not appear, however, the negative impact on their behavior was observed. According to biologist Camera of Hatter, the mouse can't tell about his health, but in their behavior were detected signs of depression, including lack of interest in the Sahara and to search for food. The tests showed a reduction in traffic mice. In addition, mice have impaired memory and cognitive abilities, I lost interest in the outside world.

Animals have increased levels of the hormone cortisol, which causes depression. After receiving mice antidepressants symptoms of depression softened, which proves, according to scientists, the primacy it is depression.

The results of studies in mice show the presence in the retina of rodents special light-sensitive cells, activated under the influence of the rays of light directed at them, and affecting areas of the brain responsible for mood, memory and learning. According to the researchers, in the case of man, the action mechanism is similar.

Previous research proved the sensitivity of some people to the lack of light in winter, with shorter days. It is not rare causes of depression, from which this form of illness is called "seasonal affective disorder". According to experts, to help such patients can "light therapy".

In accordance with the research scientists of the problems appear as if the lack of sunlight and excess artificial, which we are, spending long nights at the computer or TV. When returning to a normal routine the negative effect disappears.

At the same time, canadian scientists have lately found a threat in the form of cancer during night work. Men working at night, prostate cancer is diagnosed three times more often than their colleagues on a day shift. They also have an increased risk of cancers of the bowel, bladder and lungs.

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