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Women are more frequently and intensely suffer from stress than men because women's brains are more sensitive to the production of stress hormones.

Some more than others realize the stress, but its extent is not only individuals, but sex is also changing: the Philadelphia Children's Hospital researchers say - rats, carried out experiments - that the female brain is much more sensitive to stress hormones in the production of such men .

The organization was originally a response to stress, is very suitable for the purpose of defense mechanism, which was the "old days" served only to survive. If the affected person a threat for him, and dangerous situation that has been structured in a moderate stress hormones that the shortest possible time is best to focus on and respond to the problem. In this case, an increase in heart rate, rapid breathing and muscles tighten. All this was more likely in prehistoric times to escape from danger or to repel the attack.

By now significantly transformed the everyday factors that cause stress: Fortunately, more and more rarely show up on the streets ferocious wild animals, and most of the tension in the workplace are about to make. But the latter did not remain in the physical and psychological consequences: heart problems, head, back and lower back pain, sleep disturbance, anxiety or depression is expected in most cases the symptoms caused by stress.

Research has demonstrated that these phenomena are anxiety and depression more often tormented by the women than to men. This - according to the researchers - the most common reason is that it does not differ between biochemical processes occurring in the brain. The U.S. researchers this has only analyzed the results of rat experiments is assumed, but - believe - finding some control experiments, the man also seems appropriate.

Previous studies have already drawn attention to the fact that people with mental disorders to whom considerable stress, certain regulatory processes (CRF - corticotropin releasing factor) is not functioning properly.

Rita Valentino, a research manager colleagues concluded that women's brains left out of the habituation process, which the men work, and a continuing high stress hormone levels when activated so that the body is not exposed to damage.

Valentino both male and female rats in a stressful situation, which in rodents forced to swim. After the animals' stress experience after the swim began, the researchers found that the male brain after some time accustomed to the situation, that is processed by the stress, but the condition of the females much later occurred, if at all, it was carried out. Accordingly, the latter body and much longer influenced by the stress-induced symptoms. Valentino believes that a similar mechanism, lack of it, that women are more affected by the stress accompanying phenomena.