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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 ...
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.
A list of reflexes in humans.. Abdominal reflex; Accommodation reflex — coordinated changes in the vergence, lens shape and pupil size when looking at a distant object after a near object.
Biologists led by a professor from SUNY Oneonta are saying that there may be a connection between intelligence and the length of yawning.
Yawning. We all do it and yet there's no set explanation on why we do it. And just as mysterious is that the act of yawning seems to be contagious. A new study looking at that issue has found that ...
Children's literature portal; Dr. Seuss's Sleep Book, also known as The Sleep Book, [1] is an American children's book written by Dr. Seuss in 1962. The story centers on the activity of sleep as readers follow the journey of many different characters preparing to slip into a deep slumber. [2]
Echopraxia is a typical symptom of Tourette syndrome but causes are not well elucidated. [1]Frontal lobe animation. One theoretical cause subject to ongoing debate surrounds the role of the mirror neuron system (MNS), a group of neurons in the inferior frontal gyrus (F5 region) of the brain that may influence imitative behaviors, [1] but no widely accepted neural or computational models have ...