INBDE (Integrated National Board Dental Examination) Practice Exam 2026 - Free Practice Questions and Study Guide

Question: 1 / 1180

Which muscles arise from Arch 1?

Muscles of Mastication, Anterior Digastric, Tensors

Arch 1 is also known as the mandibular arch, and it is the first of the six branchial arches that develop during embryonic development. The muscles that originate from Arch 1 are primarily responsible for movements involved in chewing and biting, known as muscles of mastication. This includes muscles like the masseter, temporalis, and medial pterygoid. Option B is incorrect because the muscles of facial expression, such as the orbicularis oris and buccinator muscles, originate from Arch 2. Option C is incorrect because the pharyngeal musculature originates from Arch 3 and 4. Option D is incorrect because the intrinsic tongue muscles, which are responsible for fine movements of the tongue, originate from Arch 3 and 4.

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Muscles of Facial Expression, Posterior Digastric, Stylohyoid

Pharyngeal Musculature

Intrinsic Tongue Muscles

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