INBDE (Integrated National Board Dental Examination) Practice Exam 2025 - Free Practice Questions and Study Guide

Question: 1 / 1180

What muscles arise from arch 4?

Cricothyroid, levator veli palatini, pharyngeal constrictors

Arch 4, also known as the fourth pharyngeal arch, gives rise to the muscles listed in option A: cricothyroid, levator veli palatini, and pharyngeal constrictors. The cricothyroid muscle is important for the regulation of vocal pitch during phonation. The levator veli palatini muscle is involved in the elevation of the soft palate during swallowing and speaking. The pharyngeal constrictors are essential muscles for the process of swallowing. Therefore, these muscles are derived from arch 4 during embryonic development.

Options B, C, and D are incorrect as they do not arise from arch 4. The intrinsic muscles of the larynx are derived from arch 6, mylohyoid and tensor tympani muscles are derived from arch 1, and the stylopharyngeus muscle is derived from arch 3.

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Intrinsic muscles of larynx

Mylohyoid and tensor tympani

Stylopharyngeus

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