In those who are depressed, the stress level does not decrease in the normal way. It damages memory and concentration, and can lead to new rounds of depression.

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This is what writes after an article from the Research Council of Norway.  

Researchers at the University of Bergen (UiB) have investigated the stress hormone cortisol, according to They found that patients with severe depression have a failure in the system that regulates stress in the body. This failure gives them poorer memory than healthy ones. Psychologist and researcher Åsa Hammer at UiB says:

- The connection between high values ​​of cortisol and depression has been known in psychiatry for over 40 years. But it is only in the last 10-15 years that researchers have become aware that high levels of cortisol over a long period of time can lead to brain cell death. It happens especially in the part of the brain called the hippocampus, where the memory is located.

- Our study shows that the ability to regulate cortisol levels is out of function in the depressed, and that it may be related to memory failure, Hammar says according to

The new studies are important for the work of preventing relapse in people who have been through a depression, but who have recovered. 

- High cortisol levels can kill brain cells, and we must find new methods to prevent relapse.

- Now I want to investigate whether attention training and concentration exercises can help keep cortisol levels down, Hammar says.