Gag Reflex CN IX — FRCA Primary MCQ

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ModerateAnatomyGag Reflex CN IXFRCA Primary

The gag reflex has its afferent limb via which cranial nerve?

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Correct answer: C — Glossopharyngeal (IX)

Afferent limb: CN IX (glossopharyngeal) from the posterior pharynx. Efferent (motor) limb: CN X (vagus) causing pharyngeal muscle contraction. Absence of gag reflex may indicate CN IX or X dysfunction.

Reference: RCoA 2021 Primary FRCA Curriculum