Tuesday, November 10, 2020

Brain Scientists Explore the How of When

A new study offers the strongest evidence yet of “time cells” in the brain.



Merriam-Webster’s defines a time warp as a “discontinuity, suspension or anomaly” in the otherwise normal passage of time; this year all three terms could apply. It seems like March happened 10 years ago; everyday may as well be Wednesday, and still, somehow, here come the holidays — fast, just like every year.

Some bard or novelist may yet come forth to help explain the paradoxes of pandemic time, both its Groundhog Days and the blurs of stress and fear for those on the front lines, or who had infectious people in their household. But brain science also has something to say about the relationship between perceived time and the Greenwich Mean variety, and why the two may slip out of sync.

In a new study, a research team based in Dallas reported the first strong evidence to date of so-called “time cells” in the human brain. The finding, posted by the journal PNAS, was not unexpected: In recent years, several research groups have isolated neurons in rodents that track time intervals. It’s where the scientists look for these cells, and how they identified them, that provide some insight into the subjective experiences of time.

“The first thing to say is that, strictly speaking, there is no such thing as ‘time cells’ in the brain,” said Gyorgy Buzsaki, a neuroscientist at New York University who was not involved in the new research. “There is no neural clock. What happens in the brain is neurons change in response to other neurons.”


Read more: https://www.nytimes.com/2020/11/10/science/brain-time-neuroscience.html

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