A yawn is a reflex in vertebrate animals characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with ...
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Yawn comes from gionian in Old English, "open the mouth wide." Definitions of yawn. noun. an involuntary intake of breath through a wide open mouth; usually ...
The most scientifically backed theory about why we yawn is brain temperature regulation. Inhaling air can help cool brain temperature down.
Jul 10, 2018 · We yawn a lot when we're tired or warm, and sometimes we even yawn just because we see other people yawning! But why do we yawn in the first ...
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Nov 8, 2023 · Yawning may aid in brain thermoregulation by increasing blood flow to the head. The contagiousness of yawning suggests it may be an empathetic ...
Jul 5, 2022 · Although excessive yawning is usually attributed to being sleepy or bored, it may be a symptom of an underlying medical problem.
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Answer. Yawning might serve a social function (to communicate boredom) and a physiological function (regulation of body state).
Feb 1, 2021 · Experts classify yawns into two types: A yawn that occurs on its own, which experts call spontaneous yawning, and a yawn that occurs after ...
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