According to foreign media reports, the clock in the brain does not keep pace with the most accurate clock in the world On the contrary, the brain clock seems to fly by at one time and remain stationary at another. < p > < p > studies have found that when the brain is repeatedly exposed to the same time interval, nerve cells or brain cells will be over stimulated, and the number of activation is significantly reduced. However, human perception of time is complex, and many other factors can explain why time is sometimes slow and sometimes fast. < / P > < p > it was only recently that we began to understand how the human brain perceives time. In 2015, researchers first found evidence that neuronal activity fluctuated with our perception of time. However, it is unclear whether these neurons found in the cerebellar region of the superior marginal gyrus (SMG) accurately timed the brain or created a subjective experience of time ? < / P > < p > in this latest study, scientists demonstrated this by using “time illusions” on 18 healthy subjects who underwent functional magnetic resonance imaging scans to measure brain activity by detecting changes in blood flow. After < / P > < p > the subjects went through a “adaptation period” during which, for about 250-750 milliseconds, they saw a gray circle appear on the black background for 30 consecutive times. < / P > < p > for a period of time after that, the subjects saw another circle as a “test stimulus.” they listened to the white noise for a period of time and were asked whether the test stimulus was longer or shorter than the white noise. They used white noise as a reference because auditory stimuli are not affected by the visual adaptation period, but visual test stimuli are affected by the visual adaptation period. < / P > < p > the researchers found that if the length of the test stimulus was similar to the duration of the adaptive stimulus, the activity in the cerebellar region of the superior limbic gyrus would be reduced, in other words, neurons in this area were less excitable than the first “touch” of the gray circle. Masamichi Hayashi, a cognitive neuroscientist at the center for information and neural networks at the National Institute of information and communication technology in Japan, said: “their idea is that this repetitive fatigue neuron is very sensitive to time persistence, but other neurons are also active to certain persistent events.” < / P > < p > the difference of brain activity level distorts the subjects’ perception of time. If the time of exposure to stimulation is longer than the time of brain adaptation, the tester will overestimate the time; if the time of exposure to stimulation is shorter than the time of brain adaptation, the tester will underestimate the time. < / P > < p > this may distort our sense of time in the real world. For example, the audience of a piano concert may adapt to the rhythm of the music. Even if you are playing music with the right beat, the audience may subjectively feel that your music rhythm is slower than the actual situation after listening to fast music. But we can’t say that neuronal fatigue “distorts” the brain’s time perception, because our research only shows the correlation between neuronal fatigue and subjective time warping, and we will focus on causal relationship in the next step. For example, our perception of time may be closely related to our expectations, may be related to the chemical substances in the brain, and even related to the speed of brain cells activating each other and forming networks when performing certain activities. Solving this problem will be a future research Important direction. Privacy Policy