Question

multiple choice question
when a physician moves a finger in front of a patients face, asking them to follow its movement with their eyes, they are testing the function of the______nerve.

• vestibulocochlear
• vagus
• glossopharyngeal
• trochlear

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Explanation:

To solve this, we analyze each option:

• Vestibulocochlear nerve: Related to hearing and balance, not eye movement.
• Vagus nerve: Involved in visceral functions (e.g., digestion, heart rate), not eye movement.
• Glossopharyngeal nerve: Involved in taste, swallowing, etc., not eye movement.
• Trochlear nerve: Controls eye movement (specifically for downward and inward eye movements, relevant for following a moving finger).

Answer:

D. trochlear