Which nerve innervates the parotid salivary gland?

The glossopharyngeal nerve is the correct choice for innervating the parotid salivary gland. This nerve, designated as cranial nerve IX, primarily provides sensory and motor functions in the throat and contributes to the parasympathetic innervation of the parotid gland. Specifically, it stimulates the gland to produce saliva by relaying signals that activate its secretory cells.

The glossopharyngeal nerve is connected to the otic ganglion, and from there, the postganglionic fibers travel to the parotid gland to facilitate saliva secretion. Understanding this pathway is essential for dental nursing, as it highlights the relationship between nerve function and the physiological processes of salivation.

In contrast, while the trigeminal nerve is crucial for facial sensations and motor functions related to the muscles of mastication, it does not innervate the parotid gland. The vagus nerve, known for its extensive role in the autonomic nervous system, primarily influences the thoracic and abdominal visceral organs rather than the parotid gland. Lastly, the facial nerve is responsible for innervating the muscles of facial expression and the submandibular and sublingual salivary glands, but it does not play