According to the report from science, it was revealed that time in the brain doesn’t follow the steady ticking of the world’s most precise clocks.
When brain is getting tired, the cells may distort your sense of time, a new study revealed.
Many factors explains why times moves slowly sometimes and quickly at others…our perception of time is complicated and when brain has been eposed to same exact time interval too many times, it was said that neurons or brain cells get overstimulated and fire less often.
But we have only recently begun to understand how our brains perceive time.
In 2015, researchers found the first evidence of neurons activity fluctuates with our perception of time.
With the first evidence at hand as at then, the only issues they have is that, it wasn’t clear if these neurons, found in a small brain region called the supramarginal gyrus (SMG), were keeping accurate time for the brain, or creating a subjective experience of time.
The new study shows that researchers used a “time illusion” on 18 healthy volunteers to figure it out. participants hooked up to a functional magnetic resonance imaging (fMRI) machine that measures brain activity by detecting changes in blood flow.
After this, the participants were shown another circle for a set period of time as a “test stimulus.” They were then told to listen to white noise for a certain amount of time and asked if the test stimulus was longer or shorter than the white noise. (They used white noise as a reference because an auditory stimulus isn’t affected by the visual adaptation but the visual test stimulus is).
They found that if the test stimulus was similar in length to the adaptation stimulus in duration, activity in the supramarginal gyrus decreased. In other words, neurons in that region fired less than when they were first exposed to the grey circle.
Why all this? the idea is that this repetition “tired out neurons,” that are sensitive to that time duration, lead author Masamichi Hayashi said, a cognitive neuroscientist at the Center for Information and Neural Networks at the National Institute of Information and Communication Technology in Japan.
But other neurons that are sensitive to other durations were still active.
The difference in activity of all the experiment so far…is level distorted the participants’ perception of time, If exposed to a stimulus longer than the duration the brain was adapted to, the participant overestimated time and if exposed to a shorter stimulus, the participant underestimated time.