For most people, the lack of insomnia often leads to a sluggish second day. However, there will be one or two people in each person's circle of friends, claiming that they can stay in the air for only three or four hours a night.
Now, a study published in the journal Brain and Behavior found that such night owls may actually be able to function with little sleep, but their bodies are likely to be more exhausted than they realize. In fact, these night owls may fall into a state of war several times in a day, but they don't know.
In this study, psychologists, radiologists, and neuroscientists from the University of Utah in the United States observed magnetic resonance imaging of approximately 900 subjects. The researchers divided them into two groups according to whether the sleep of the subjects last month was sufficient. The “less sleep group†sleeps no more than 6 hours per night. The sleepy group was further divided into two subgroups: one group reported that they were unable to work properly during the day, such as still feeling groggy when completing simple work, and the other group said that they felt good overall.
In the brain magnetic resonance imaging of these sleepy people, the researchers observed an interesting phenomenon: the brain waves they receive when scanning are more like a typical sleep waveform than a awake state.
In other words, the scan results show that, despite being asked to "keep awake," some of the sleeper's consciousness is temporarily in a state of ambiguity. Dr. Jeff Anderson, one of the co-authors of the study and associate professor of radiation and imaging science, said that this sleep-like pattern was observed in both subgroups of the sleepy group, regardless of whether the subject felt the daily function. Disorder.
Dr. Anderson pointed out: "For a short sleep of a minute or two, people's self-detection ability is surprisingly poor." Another co-author of the study, Dr. Christopher Jones, a clinical neurology professor, said that for those who often lack sleep. Said that the brain's awake system is always overloaded. At this time, if functional nuclear magnetic resonance is performed, and nothing can bring their spirits, they may lie on the scanning platform and get into a short sleep state.
In real life, the above situation can be much more dangerous: if a sleeper is operating a simple task in a “boring situationâ€, such as driving in a night environment that lacks visual and audible stimuli, it is likely to sleep, even in Take a nap.
However, this study also brought some good news to the sleepers: the brain scans of those who feel good about themselves have found that their brain regions related to information perception and memory are stronger than ordinary people. coupling.
“This discovery is very interesting. It means that one of the things that less sleepers do on the scanning platform may be to perform 'memory consolidation' more efficiently than ordinary people,†Dr. Anderson explained. Memory consolidation, in short, is the process of transforming short-term memory into long-term memory in the brain. "If these people can really carry out brain activity such as memory consolidation around the clock, maybe you don't need to sleep for so long at night. Maybe some people's brains can do the work that others need to do during sleep during the daytime fragmentation time. ".
The researchers said that their next study will be to directly test the cognitive performance of people who sleep less than 6 hours a day by means of a simulated driving test, and get feedback from their family and friends: "We are particularly interested. Yes, there is a big gap between how people perceive their physical functions and what they actually do. Not everyone is equally sensitive and precise."
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