Critical Care Registered Nurse (CCRN) Practice Exam

How can the function of the glossopharyngeal nerve be assessed?

1. By checking shoulder strength

2. By testing the gag reflex and swallowing

3. By observing the clarity of speech

4. By assessing hearing ability

The correct answer is: By testing the gag reflex and swallowing

The function of the glossopharyngeal nerve can be accurately assessed by testing the gag reflex and swallowing. This nerve, known as cranial nerve IX, plays a crucial role in the sensory and motor functions of the throat. It is responsible for providing sensation to the pharynx and the base of the tongue and innervates the stylopharyngeus muscle, which aids in swallowing. Testing the gag reflex involves stimulating the back of the throat, which normally elicits a gag response if the glossopharyngeal nerve is functioning properly. Additionally, swallowing can be evaluated to determine if the nerve is facilitating this action effectively, as it is also responsible for the motor function related to swallowing. This assessment enables healthcare providers to gauge the integrity of the glossopharyngeal nerve and to detect any potential neurological issues that may arise from damage to this nerve or associated structures.