Critical Care Registered Nurse (CCRN) Practice Exam

Which of the following actions is performed to assess CN XI function?

1. Checking the symmetry of facial expressions

2. Asking the patient to shrug their shoulders against resistance

3. Evaluating the patient's ability to taste food

4. Listening to the clarity of the patient’s voice

The correct answer is: Asking the patient to shrug their shoulders against resistance

To assess cranial nerve XI, also known as the accessory nerve, the most effective action is to ask the patient to shrug their shoulders against resistance. This maneuver specifically tests the strength and function of the sternocleidomastoid and trapezius muscles, which are innervated by CN XI. Observing the patient's ability to perform this action provides valuable information about the integrity of this nerve, including any potential weakness or paralysis that may indicate underlying neurological issues. The functions associated with CN XI are primarily related to shoulder elevation and head rotation, making this specific assessment critical for evaluating its performance. Other options, while important for assessing different cranial nerves or functions, do not specifically target CN XI. Checking facial expressions pertains to cranial nerve VII (facial nerve), evaluating taste relates to cranial nerves VII and IX, and listening to the clarity of the voice is more aligned with cranial nerve X (vagus nerve) and potentially others involved in voice production.