BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The nucleus of the cranial nerve emerging from the dorsal aspect of the brainstem lies in the midbrain at the level of the superior colliculus
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The trochlear nucleus: The trochlear nucleus is located in the lower part of the midbrain at the level of the inferior colliculus. The nucleus lies anterior to the cerebral aqueduct in the central grey matter. Since the trochlear nucleus is a motor nucleus, it sends fibres to innervate the superior oblique muscle.
Detailed explanation-2: -Cranial nerves one and two enter the cerebrum, but most of the cranial nerves enter or exit at various levels of the brainstem. Cranial nerves three and four emerge from the midbrain, and it’s worth mentioning that cranial nerve four is the only nerve to arise from the dorsal aspect of the brainstem.
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