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Multiple Choice
Which of the following cranial nerves is incorrectly paired with its function?
A
Olfactory nerve (CN I) – sense of smell
B
Hypoglossal nerve (CN XII) – tongue movement
C
Facial nerve (CN VII) – hearing
D
Optic nerve (CN II) – vision
Verified step by step guidance
1
Step 1: Begin by identifying the cranial nerves listed in the problem and their associated functions. Cranial nerves are part of the peripheral nervous system and are responsible for various sensory and motor functions.
Step 2: Review the function of the Olfactory nerve (CN I). It is responsible for the sense of smell, which is correct as stated in the problem.
Step 3: Examine the Hypoglossal nerve (CN XII). This nerve controls tongue movement, which is also correctly paired with its function in the problem.
Step 4: Analyze the Facial nerve (CN VII). This nerve is primarily responsible for facial expressions, taste sensations from the anterior two-thirds of the tongue, and some glandular functions (e.g., salivary glands). It is not associated with hearing, making this pairing incorrect.
Step 5: Confirm the function of the Optic nerve (CN II). It is responsible for vision, which is correctly paired in the problem. Therefore, the incorrect pairing is the Facial nerve (CN VII) with hearing.