BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following muscles is innervated by the CN? IX?
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Musculus stylopharyngeus
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Tensor muscle of the palatine skin
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Palatoglossus muscle
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Palatopharyngeal muscle
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Explanation:
Detailed explanation-1: -Motor fibers from the nucleus ambiguus innervate the stylopharyngeus muscle and participate in the innervation of the pharyngeal muscles for swallowing.
Detailed explanation-2: -Innervation. The stylopharyngeus is the only muscle of the pharynx innervated by the glossopharyngeal nerve (CN IX) (all others being instead innervated by the vagus nerve (CN X)) by special visceral motor neurons with their cell bodies in the rostral part of the nucleus ambiguus.
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