American scientists from the University of California at Berkeley conducted a study, which found that short-term stress has a positive impact on cognitive ability, first and foremost, improving the memory. Meanwhile, it is known that chronic stress, in turn, increases the risk of heart attack, and also suppresses the immune system. More detailed results of the American study published in the online journal eLife.
Experts conducted their research on rodents, during which rats were subjected to artificially created stress, which did not last long. Such short-term stress has led to the fact that in the brain of rats twice increased the number of stem cells, which were then turned into neurons. Using a special technique of marking, the researchers found that these cells participate in the learning process, during which rodents were trained for new tasks.
According to the author of the study Professor Daniela Kaufer, the stress is always perceived as something bad, but it's not. Short-term stress makes the brain more alert, and as a result he starts to work better. In her opinion, it is the stress allows the animals that live in natural conditions, be vigilant and attuned to the environment. Along with this, scientists have recognized the existence of a stress disorder that occurs after even the most minor and short-term stress.