“brain fatigue” is distorting time!?

everyone remembers that boredom slows down the flow of time, and when it’s fun, the flow of time is faster.

Research by the National Institute of Information and Communications Technology (NICT), a national research and development corporation under the jurisdiction of the Ministry of Internal Affairs and Communications in Japan, shows that “brain fatigue” is likely to affect this phenomenon that “the speed of flowing time should not change, but the time to experience is faster or slower”.

Duration-selectivity in right parietal cortex reflects the subjective experience of time | Journal of Neuroscience
https://www.jneurosci.org/content/early/2020/09/11/JNEUROSCI.0078-20.2020

‘Tired’ brain cells may distort your sense of time | Live Science
https://www.livescience.com/neuron-fatigue-time-perception-brain.html

A STUDY PUBLISHED BY MASAMICHI HAYASHI, A RESEARCHER AT NICT’S BRAIN INFORMATION AND COMMUNICATIONS LABORATORY, FOUND THAT WHEN THE BRAIN IS EXPOSED MULTIPLE TIMES AT THE SAME TIME INTERVAL, NEURONS ARE OVERSTIMATED AND IGNITE LESS FREQUENTLY.

it was only after 2010 that it became clear how the human brain perceives time, and in 2015, evidence that neuronal activity fluctuates due to perception of time was first discovered. neuronal variability was found in an area called the brain’s edge overeating, but it was not clear whether the brain maintained accurate time recognition or whether the brain was creating subjective time experiences.

 

広告

what kind of experiments did you do?

 

the study surveyed 18 healthy volunteers.

Brain activity is measured by detecting changes in blood flow with fMRI.

first, the subjects look at a picture with a gray circle on a black background as an “adaptive stimulus” for 250 to 750 milliseconds at a time, 30 times in a row, and then continues to look at the picture with different circles as a “test stimulus” for a certain period of time.

the subjects then listened to the white noise at the same time as the test stimulus and answered whether the time of the test stimulus felt longer or shorter than the time they listened to the white noise.

as a result of the experiment, Hayashi and colleagues found that when the time of adaptive and test stimuli is about the same length, neurons fire less frequently and their activity of more than margins weakens.

in other words, by having the subject experience a test stimulus and an adaptive stimulus that is a similar stimulus at the same time, the subject felt the white noise, which was originally the same length, and felt the time of the test stimulus for a long time.

 

according to Hayashi, the subject’s brain was distorted in time perception.

it is said that it is “the result of exhaustion of neurons sensitive to the same sequence of stimuli”.

Hayashi says, “since our research shows only the correlation between ‘neuronal exhaustion’ and ‘subjective time distortion’, we cannot say that time perception bias is caused by neuron fatigue at this time.

our next step is to look at causality.”

広告