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The Unexpected​ Brain Benefits of a Yawn

A recent study from the University of New south ‌Wales in Australia has revealed a surprising function of yawning⁣ – it appears to facilitate the movement of cerebrospinal fluid around the brain. Researchers used magnetic⁤ resonance imaging (MRI) to observe the brains⁢ and necks⁤ of 22 healthy adults while they yawned, took‍ deep breaths, suppressed ​a yawn, or breathed normally, aiming to understand how this common reflex impacts brain fluids.

Yawning vs. Deep Breathing: A Fluid Shift

Contrary to expectations,the study found that yawning doesn’t ‍mimic the effects of deep breathing. ⁢While⁣ a forced inhalation pushes cerebrospinal fluid into the brain, yawning‍ actually causes it to move in the opposite direction, away from the brain. This finding, ​described ⁤as “entirely unexpected” by the research team, challenges previous assumptions about the purpose of⁣ yawning. New Scientist reports​ on the study’s findings.

“The‍ yawn was causing fluid movement in the opposite direction to⁣ deep breathing, and​ we were very surprised,” explained neuroscientist Adam Martinac, a⁢ co-author of the study.

Increased Blood Flow and Individual Patterns

the research also demonstrated that both ⁣yawning and deep breathing increase the outflow of blood from ‍the brain, creating space for fresh blood to enter. However, this