Question
Nerve supply of circumvallate papillae is:
| A. |
Hypoglossal nerve
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| B. |
Glossopharyngeal nerve
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| C. |
Lingual nerve
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| D. |
Chorda tympani
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Show Answer
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Correct Answer � B
Explanation
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|
Ans. B. Glossopharyngeal nerve
Circumvallate papilla is one of the large papillae near the base on the dorsal aspect of the tongue arranged in a V-shape. The taste buds are located in the epithelium of the trench surrounding the papilla.
Motor nerve supply of tongue: All the intrinsic and extrinsic muscles of the tongue are supplied by the hypoglossal nerve except the palatoglossus muscle which is supplied by the cranial part of the accessory nerve through the pharyngeal plexus.
Glossopharyngeal nerve is both general sensory and special sensory to the posterior 1/3rd of the tongue and circumvallate papillae. Posterior most part of the tongue is supplied by the internal laryngeal nerve which is a branch of vagus nerve.
