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Effective sleep training

09.09.2012

In the morning, a person is able to remember the associations created in his brain during sleep - this was stated in Nature Neuroscience by scientists from the Weizmann New Research Institute, where a series of experiments were conducted on volunteers. The essence of their work was that the experimental volunteers in a dream were first subjected to alternate effects of smells and sounds, and then only sounds. Scientists have found that after waking up, the subjects, having heard the sound from their dream, easily and without misfires recalled the smell corresponding to it. In other words, scientists have been able to prove that people can learn and assimilate new information while they sleep.

Sleep learning experiments have been going on for a long time. Since the 60s of the last century, students have tried to fall asleep to a tape recorder with lectures before exams - the results were depressing. The most rigorous tests of "by ear" sleep learning have failed to prove that new knowledge actually remains in memory after waking up. It turned out that this is very difficult to achieve. Then there were considerations that it is necessary to use not only auditory, but also other types of memory. But while more and more research is showing the importance of using sleep for learning, no scientist has yet been able to prove that the brain of a sleeping adult actually absorbs new information.

Renowned Israeli scientist Professor Noam Sobel and his graduate student Anat Arzi from the Department of Neurobiology of the Weizmann Institute of Science, in collaboration with researchers from the Levinstein Rehabilitation Center and the Tel Aviv-Yafo Academic College, decided to experiment with the complex effects of sounds and smells on humans.

Volunteers fell asleep in a special chamber, and their state of sleep was constantly monitored by sensors. The results were followed very strictly. For example, if the subject woke up even for a moment, his results were ruthlessly rejected. The chamber was alternately filled with pleasant and unpleasant odors, and certain sound signals corresponded to them. In sleep, people began to breathe deeper if they liked the smell, or breathe shortly if the smell was unpleasant. They also reacted if in a dream they heard only one sound that previously accompanied the corresponding aromas. And what is most striking, after waking up, the subjects reacted reflexively to the same sounds in the same way as in a dream - they began to breathe deeper to the sounds of "pleasant" smells, and vice versa to the sounds of "unpleasant" ones. And despite the fact that they did not remember the sounds themselves.

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