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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 muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds.
Yawning often feels involuntary—it’s triggered by the same part of the brain as sneezing, Sullivan says. But the difference is, a yawn can be controlled from “the top down” if you think ...
It is termed faucalized because of the stretching of the fauces and visible narrowing of the faucial pillars in the back of the oral cavity. During faucalized voice, the sides of pharynx expand outward and the larynx descends and tilts forward. The term "yawny voice" is appropriate to compare this voice quality to the physiological act of yawning.
Several comfort behaviours are associated with the beginning of a rest period (e.g. grooming), whereas others are associated with the end of a rest period (e.g. stretching), possibly to prepare the body for escape or
Merely thinking about or seeing someone yawning can make you yawn. But why?
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Yawning is considered a non-respiratory gas movement. A non-respiratory gas movement is another process that moves air in and out of the lungs that do not include breathing. Yawning is a reflex that tends to disrupt the normal breathing rhythm and is believed to be contagious as well. [14] The reason why we yawn is unknown.
328 participants were asked to watch a three-minute video of people yawning and to keep track of how many times they yawned. Of the 328 participants, 222 contagiously yawned.