Only nerve that originates from the dorsal surface of the brain stem is______________?
Correct answer: A. Trochlear
- A. Trochlear
- B. Occulomotor
- C. Vagus
- D. Abducent
Explanation
The trochlear nerve is the only cranial nerve to emerge from the dorsal surface of the brainstem, appearing below the inferior colliculus. The other listed nerves emerge from the ventral or lateral brainstem.
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