The stylopharyngeus muscle and the glossopharyngeal nerve (CN IX) are derived from structures associated with which pharyngeal arch?

A First pharyngeal arch

B Second pharyngeal arch

C Third pharyngeal arch

D Fourth pharyngeal arch

✓ Correct Answer: Option C

The third pharyngeal arch gives rise to the stylopharyngeus muscle and is innervated by the glossopharyngeal nerve (CN IX). It also contributes to the greater horn and lower body of the hyoid.

💡 Why is C) the correct answer?

The correct answer to the question "The stylopharyngeus muscle and the glossopharyngeal nerve (CN IX) are derived from structures associated with which pharyngeal arch?" is Option C: Third pharyngeal arch.

The other options — A) First pharyngeal arch, B) Second pharyngeal arch, D) Fourth pharyngeal arch — are incorrect for this USMLE Exam Prep question. As explained above: The third pharyngeal arch gives rise to the stylopharyngeus muscle and is innervated by the glossopharyngeal nerve (CN IX). It also contributes to the greater horn and lower body of the hyoid.

📚 About This USMLE Exam Prep Practice Question

This 3-level USMLE Exam Prep question from the Step 1 – Basic Sciences topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free USMLE Exam Prep practice test or use flashcards for spaced repetition review.

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The stylopharyngeus muscle and the glossopharyngeal nerve (CN IX) are derived from structures associated with which pharyngeal arch?

✓ Correct Answer: Option C

📚 About This USMLE Exam Prep Practice Question

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