<Ul> <Li> the sensory limb is mediated predominantly by CN IX (glossopharyngeal nerve) </Li> <Li> the motor limb by CN X (vagus nerve). </Li> </Ul> <Li> the sensory limb is mediated predominantly by CN IX (glossopharyngeal nerve) </Li> <Li> the motor limb by CN X (vagus nerve). </Li> <P> The gag reflex involves a brisk and brief elevation of the soft palate and bilateral contraction of pharyngeal muscles evoked by touching the posterior pharyngeal wall . Touching the soft palate can lead to a similar reflex response . However, in that case, the sensory limb of the reflex is the CN V (trigeminal nerve). In very sensitive individuals, much more of the brain stem may be involved; a simple gag may enlarge to retching and vomiting in some . </P>

What does it mean to have a good gag reflex