Manic-depressive illness helps to survive in cold countries Bashny.Net

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Bipolar disorder (also known as manic-depressive illness) - it is a mental illness in which patients have periods of mood (known as mania or hypomania) and depression.

During 20 years in patients with bipolar disorder, the risk of suicide is increased by more than 6% and harm themselves is found in 30-40% of cases.

Now, some scientists believe that bipolar disorder may be certain advantages, and it is the result of the evolution of mankind. It is argued that, in situations of high stress or threat of depression can serve as a defense mechanism.

Doldrums forcing the individual to escape from the causes of stress. He or she will also sleep more to conserve resources and energy to better times. Mania, on the other hand, stimulates creativity, confidence and gives a lot of energy.

Evolutionary biologists have suggested that bipolar disorder might arise as a result of adaptation to extreme climatic conditions of the northern temperate zone. Doldrums helped to survive during the long winters by increasing sleep time (like minispyachku), lethargy, lack of interest in social activities and abandonment of overeating - all this could contribute to survival in winter.

Since the summer was short, affective state would increase the energy level of the individual, which would allow to perform many tasks in a short period of time in preparation for winter.

via factroom.ru