Which method is used to evaluate the glossopharyngeal nerve?

The correct method to evaluate the glossopharyngeal nerve involves assessing the gag reflex, which is an important function of this nerve. The glossopharyngeal nerve plays a critical role in both sensation and motor functions in the throat, including the ability to elicit the gag reflex. Testing the gag reflex helps determine the integrity of the nerve as it stimulates the muscles of the pharynx and monitors the sensory feedback from the back of the throat.

When a patient says "Go king kong," it can elicit a response that helps evaluate the nerve's functions, particularly its role in swallowing and protecting the airway. This method allows healthcare providers to assess whether the glossopharyngeal nerve is functioning properly, ensuring that both sensory input and motor responses are adequately tested.

Other options do not serve this purpose. For instance, testing hearing pertains to the functioning of the auditory nerve, evaluating facial movements relates to the facial nerve, and tongue movement primarily assesses the hypoglossal nerve. Therefore, the gag reflex test distinctly aligns with the functions associated with the glossopharyngeal nerve.