What is the frequency of lack of gag reflex in healthy people?

Bottom line:  Up to a third of healthy people have no gag reflex.

Davies AE, et al.  Pharyngeal sensation and gag reflex in healthy subjects.  Lancet 1995; 345: 487-88.

Study of 140 healthy subjects.  37% of the subjects had no gag reflex (slightly more frequent in the elderly subjects and less frequently in the younger subjects.

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About Amy

Clinical Informationist at EUH Branch Library
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