Parasympathetic innervation to the parotid gland travels via which pathway?

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Multiple Choice

Parasympathetic innervation to the parotid gland travels via which pathway?

Parasympathetic supply to the parotid gland comes from the glossopharyngeal nerve. The preganglionic fibers originate in the inferior salivatory nucleus and travel with the tympanic nerve and then the lesser petrosal nerve to synapse in the otic ganglion. From there, the postganglionic fibers hitchhike on the auriculotemporal nerve, a branch of V3, to reach the parotid gland and stimulate secretion. This route distinguishes the parotid from other glands: the submandibular gland uses a CN VII pathway to the submandibular ganglion with postganglionic fibers traveling with the lingual nerve, while sympathetic fibers from the superior cervical ganglion provide non-parasympathetic influence, and the vagus does not provide the principal parotid innervation.

Parasympathetic supply to the parotid gland comes from the glossopharyngeal nerve. The preganglionic fibers originate in the inferior salivatory nucleus and travel with the tympanic nerve and then the lesser petrosal nerve to synapse in the otic ganglion. From there, the postganglionic fibers hitchhike on the auriculotemporal nerve, a branch of V3, to reach the parotid gland and stimulate secretion. This route distinguishes the parotid from other glands: the submandibular gland uses a CN VII pathway to the submandibular ganglion with postganglionic fibers traveling with the lingual nerve, while sympathetic fibers from the superior cervical ganglion provide non-parasympathetic influence, and the vagus does not provide the principal parotid innervation.

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