Cranial Nerve IX functions include which of the following?

Cranial Nerve IX functions include which of the following?

• A. Hearing and balance
• B. Throat sensation, taste, swallowing
• C. Neck movement
• D. Swallowing, parasympathetic supply

Answer: (B)

Glossopharyngeal nerve (cranial nerve IX) is a mixed nerve with sensory, special sensory (taste), motor, and parasympathetic components. It provides throat sensation from the oropharynx, taste from the posterior one-third of the tongue, and motor innervation to the stylopharyngeus muscle to assist swallowing. It also carries parasympathetic fibers to the parotid gland. Because of these roles, a statement describing throat sensation, taste, and swallowing best captures its overall functions. Hearing and balance come from the vestibulocochlear nerve, neck movement from the accessory nerve, and while parasympathetic supply and swallowing are both part of IX’s duties, the most complete fit is throat sensation, taste, and swallowing.

Glossopharyngeal nerve (cranial nerve IX) is a mixed nerve with sensory, special sensory (taste), motor, and parasympathetic components. It provides throat sensation from the oropharynx, taste from the posterior one-third of the tongue, and motor innervation to the stylopharyngeus muscle to assist swallowing. It also carries parasympathetic fibers to the parotid gland. Because of these roles, a statement describing throat sensation, taste, and swallowing best captures its overall functions. Hearing and balance come from the vestibulocochlear nerve, neck movement from the accessory nerve, and while parasympathetic supply and swallowing are both part of IX’s duties, the most complete fit is throat sensation, taste, and swallowing.