The gag reflex, also referred to as a pharyngeal spasm, is an automatic contraction of the back of the throat that is usually evoked by touching either the back of the tongue, the roof of the mouth, or the back of the throat.
http://www.medicaldaily.com/can-acupuncture-prevent-gag-reflexes-those-avoiding-dentists-might-benefit-traditional-chinese
http://www.medicaldaily.com/can-acupuncture-prevent-gag-reflexes-those-avoiding-dentists-might-benefit-traditional-chinese
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