The shock! When a person dreams, the brain is awake and can still obtain information selectively from the outside world.

Introduction: there are two states of the brain during sleep: REM sleep and non REM sleep.non REM sleep is called "deep sleep", and the lightest sleep stage occurs at the beginning of sleep.and one of the most significant characteristics of REM sleep is the rapid eye movement. Most of people's dreams occur in this period. Although this is not the only dream time period, all vivid and interesting dreams are generated during this period.scientists from CNRS, ens-psl and Monash University in Australia have shown that during the sleep phase associated with dreams, the brain suppresses information from the outside world, such as the voice of conversation.this ability is one of the protective mechanisms of dreams.the study was conducted in collaboration with the H ô Tel Dieu sommeil et de la vigillance center of Hewlett Packard University in Paris and published in the journal contemporary biology on May 14, 2020.when we dream, the world we create has nothing to do with the peace of our bedroom.in fact, it is very unusual for the environmental elements in front of us to integrate into our dreams.to better understand how the brain protects itself from external influences, the researchers invited 18 participants to go to bed early in the laboratory.early sleep is rich in dreams.most dreams occur in the so-called rapid eye movement (REM) sleep, because at this stage of sleep, the brain is somehow awake and exhibits brain activity similar to that of people when they are awake.on the other hand, the body is not completely paralyzed.during some stages of REM sleep, the eyes continue to move.studies have shown that this exercise is related to dreaming.early to bed patterns after cocktails to study how the dream brain interacts with external sounds, scientists asked volunteers to listen to stories in French and meaningless language.by combining electroencephalogram with machine learning technology, they confirmed that even when the brain is sleeping, it continues to record what's going on around it.they also showed that the brain prioritizes meaningful speech during light sleep, just as it does when awake. selectively amplify informative speech in awake and sleeping states. However, in the eye movement phase of REM sleep, this language is actively filtered out. selective suppression of informative language information during eye movement depends on the existence of eye movement. In other words, our sleeping brain can select information from the outside world and flexibly enlarge or suppress it, depending on whether it is immersed in dreams! The study first confirmed that auditory stimuli are still processed by the sleeping brain, which is consistent with the neural response of the auditory cortex to external sounds during REM sleep. the researchers further add some evidence that significant stimuli are selectively processed during REM sleep. more importantly, the presentation of competing auditory flow enables us to demonstrate that information stimuli can be flexibly enhanced or suppressed in response to eye movement. these results are consistent with previous reports that the presence of eye movement reduces the response to auditory stimuli and abnormal tones during REM sleep, and that the arousal threshold during phase sleep is higher than that during tonic REM sleep. nevertheless, by demonstrating that this stimulus gating does not affect the encoding of meaningless speech during REM sleep, we provide the first evidence of selective sensory inhibition during eye movement. the team believes that this mechanism enables the brain to protect the dream phase, which is necessary for emotional balance and consolidation of the day's learning. although dreams dominate during eye movement, they also occur in other stages of sleep. so, is dream accompanied by similar inhibition of external feelings? Reference: [1] [2] recommended reading: fighting the epidemic situation, translational medicine network content team series reports: [Science] using artificial protein to design vaccines has a very broad prospect. [Nature] genetic analysis shows that humans can infect dogs with coronavirus, but there is no evidence that dogs can infect humans [JCI new discovery] Danish scientists have found new breast cancer bases in young women This is because the research of nature sub journal confirmed that the triple therapy of fasting, vitamin C and chemotherapy is effective for refractory cancer