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8. Other Yawning Theories

One theory, which has been mostly debunked at this point, suggests that people yawn to help bring more oxygen into the body. While some people believe tiredness causes yawning, others think it is a way of waking the body up in the morning. As you stretch your arms and legs, the yawning motion also flexes the tissues of the body as blood to the brain increasing alertness. Do you yawn more when you have a migraine? To go with the theory of Andrew C. Gallup, Ph.D., this is because your blood clots in your brain during a migraine and yawning can help cool your brain down from clotting.

theories of yawn

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