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Yawning Does Something Unexpected in Your Brain, MRI Scans Reveal

Summary by Science Alert
Yawning has an unusual and unexpected effect on the flow of fluid protecting the brain, a recent study reveals, though it's not yet clear what the impact of this shift might be.

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The study, conducted by a team from the University of New South Wales in Australia, looked at what happens in the brain when people yawn, take a deep breath, or control their yawning. The experiment involved 22 healthy volunteers, monitored using magnetic resonance imaging. The results showed that although yawning is very similar to deep breathing, the effects inside the brain are different. “Surprisingly, yawning changes the direction of cerebr…

A study using magnetic resonance imaging (MRI) showed that yawning is not simply a sleep reflex, but may also directly affect the flow of cerebrospinal fluid, a crucial factor in "cleaning" and protecting the brain.

A recent study from the University of New South Wales in Australia revealed that yawning has an unexpected effect on the flow of cerebrospinal fluid, which protects the brain. The research suggests that this finding may provide clues about the evolution of yawning behavior in humans and other species. Discovery about Yawning and Cerebrospinal Fluid Researchers observed that yawning causes a movement of cerebrospinal fluid (CSF) in the opposite d…

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labonline.com.au broke the news on Thursday, April 30, 2026.
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