A number of individuals submissive experiments with escáneres allowed to discover that during the dream the producing chemical signals of stress, “go out” during the phase of dream with fast ocular movements or dream REM, that is the phase in which the dreams with more intensity and regularity take place.
Before putting under them escáneres a series of 150 disquieting images was to them the 35 volunteers, divided in two groups. Those that managed to sleep between a session of images and another one well, were able to process better their emotional reaction in the second session.
According to the published thing in the magazine Current Biology, the results show that “there is a bond between the dreams and the memories.” This explains why those that suffer TEP (Upheaval by Post-traumatic Stress), like the veterans military, have difficulties to recover of the traumatic experiences and undergo “nightmares appellants.” And what is more interesting, also they explain why we dreamed: “There is important evidence that 20% of our dream, that forms the phase REM, play a significant role in the processing of recent memories.”
The explanation comes from the activity cerebral neurochemistry, concretely of the norepinefrina or noradrenaline, chemical compound associated to stress. “When processing previous the emotional experiences in this atmosphere neuroquímicamente surely - of loss norepinefrina- during the dream REM, we woke up on the following day and the emotional force of those experiences is smoothed.” The sensation is the one of which we can face better those emotions.
The group of subjects that slept bad or that did not sleep, processed the visualization of the second turn of images with much more emotional load than the group that could sleep well and dream. According to the investigators they are the neuroquímicos changes that happen in the brain during the dream REM the people in charge of the emotional processing.
Even so it is necessary to consider that the causes of the TEP are multiple and that the elaboration of the traumatic emotions depends on many other factors, according to explains to the BBC doctor Roderick Orner, specialist in clinical psychology. “In cases of more severe trauma the patient could be very difficult to process those experiences during the dream, especially if the event has had an important impact in the daily life of the person.”