Published on: 2025-06-26 09:00:50
Though sleep is a time to power down and replenish our energy, our brains remain surprisingly active when we’re at rest. In fact, more goes on behind our closed eyelids than we previously thought, according to a team of researchers that recently analyzed eye movements during slumber. In a study published Wednesday in the journal Nature Communications, researchers in Switzerland analyzed the pupils of sleeping participants. The study reveals that our pupils constantly change size while we’re unc
Keywords: activation brain pupil sleep study
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