Researchers from the U.S., Israel and France have discovered why a person during sleep periodically moving the eyes. The results of a study published edition of Nature Communications.

Eye movements are recorded in fast phase of sleep. At the same time, people have dreams. Scientists previously assumed that eye movements are linked to visual next, however, scientific confirmation of the theory was not.

In the study, scientists observed within four years for brain activity of 19 volunteers. Among the subjects included in including people with epilepsy. Estimated activity of the medial temporal lobes of the brain. These areas are responsible for processing visual information and its recall.

When in the temporal cortex receives visual information, the neurons of this area go to awake mode. Moreover, activation of the temporal cortex during sleep is common. However, it happens only in the fast phase, when there are "frames" of the dream.

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