Which cranial nerve exits the dorsal surface of the brainstem?

Which cranial nerve exits the dorsal surface

Multiple choice — select the best answer

ACN III
BCN VI
CCN VII
DCN IV

✓ Correct answer: D. CN IV The trochlear nerve (CN IV) is unique in exiting the dorsal (posterior) surface of the midbrain, just below the inferior colliculi. All other cranial nerves emerge from the ventral or lateral brainstem surfaces.

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Topic: Cross-Sectional Anatomy

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Which cranial nerve exits the dorsal surface of the brainstem?

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