People traveling around the world can feel tired and have forgetfulness. This state, it happens, lasts for a month after returning home. The reason lies in the disorder of biorhythms, which cause temporary changes in the brain. A similar situation is with people working on the night shift, or according to an unmeasured schedule, says Professor Lance Kriegsfeld of the University of California.

To test the theory, female hamsters were selected. At six o'clock the scientist rebuilt their habitual daily routine, characteristic of the changes experienced by a man flying from New York to Paris. The experiment lasted four weeks. As a result, animals began to experience difficulties with the fulfillment of tasks. At the same time, this problem remained relevant all month even when hamsters were transferred to normal mode, notes ABC News.

According to the expert, at this moment it was possible to fix the decline of neural activity in the hippocampus - the part of the brain responsible for memory. By the way, previous studies have shown: people who are forced to often fly, have atrophy of the temporal lobe of the brain. Now it has been proved that such a rhythm disturbance threatens to inhibit the process of formation of a new nerve tissue in the hippocampus.

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