Sleep in a new place many is a struggle. As a result, we Wake up tired. Experts from brown University tried to figure out why this is happening. As it turned out, in the new environment for sleep one hemisphere of the brain continues to operate at full capacity.
To understand the problem, scientists give the example. In marine animals and birds evolutionary entrenched asymmetry of brain activity. When one hemisphere of the brain is working, the other rests. The man in the process of its development has lost this function. However, recent research shows, our nervous system has retained the germ of the described mechanism. It manifests itself only when changing sleep.
It continues to watch the left half of the brain. The human nervous system is extremely flexible. That is why many processes in it occur on complex algorithms that modern science has yet to describe and explain.