Where are the salivatory nuclei located?

Where are the salivatory nuclei located?

• A. Pontomedullary junction
• B. Midbrain tectum
• C. Cerebellar peduncle
• D. Spinal cord

Answer: (A)

Salivatory nuclei are parasympathetic preganglionic centers in the brainstem, with two parts: the superior salivatory nucleus in the caudal pons and the inferior salivatory nucleus in the rostral medulla. They sit around the pontomedullary junction, which is why this location is cited for both nuclei. Their fibers travel with cranial nerves VII and IX to innervate the salivary glands (facial pathway to lacrimal, submandibular, and sublingual glands; glossopharyngeal pathway to the parotid via the otic ganglion). The other options don’t fit because the midbrain tectum is above the pons and doesn’t house these nuclei, the cerebellar peduncle is a fiber bundle, not a nucleus, and the spinal cord does not contain these parasympathetic salivatory centers.

Salivatory nuclei are parasympathetic preganglionic centers in the brainstem, with two parts: the superior salivatory nucleus in the caudal pons and the inferior salivatory nucleus in the rostral medulla. They sit around the pontomedullary junction, which is why this location is cited for both nuclei. Their fibers travel with cranial nerves VII and IX to innervate the salivary glands (facial pathway to lacrimal, submandibular, and sublingual glands; glossopharyngeal pathway to the parotid via the otic ganglion). The other options don’t fit because the midbrain tectum is above the pons and doesn’t house these nuclei, the cerebellar peduncle is a fiber bundle, not a nucleus, and the spinal cord does not contain these parasympathetic salivatory centers.