Neurons in corresponding locations of the different brains fire at the same time, creating matching patterns, like dancers moving together. Auditory and visual areas respond to shape, sound and movement in similar ways, whereas higher-order brain areas seem to behave similarly during more challenging tasks such as making meaning out of something seen or heard. The experience of "being on the same wavelength" as another person is real, and it is visible in the activity of the brain.For example, she tells us, "Couples exhibit higher degrees of brain synchrony than nonromantic pairs, as do close friends compared with more distant acquaintances." There's a name for the study of such moments: collective neuroscience.
LYDIA DENWORTH, "BRAIN WAVES SYNCHRONIZE WHEN PEOPLE INTERACT," SCIENTIFIC AMERICAN, JULY 1, 2023
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Comment: See also: MindMatters: Meaning All the Way Down: The Wonders and Mysteries of Language with Juliana Barembuem