GROSS ANATOMY

Detailed explanation-1: -The masseter is one of the muscles of mastication. It is a powerful superficial quadrangular muscle originating from the zygomatic arch and inserts along the angle and lateral surface of the mandibular ramus.

Detailed explanation-2: -Attachments of Masseter Muscle: Origin & Insertion Origin: (proximal attachments): Zygomatic arch (medial surface and inferior border). Insertion: (distal attachments): Lateral surface of angle and ramus of mandible.

Detailed explanation-3: -The ramus is bound by two surfaces and four borders and contains two processes. Lateral surface: The lateral surface contains a portion of the oblique line, which began on the external surface of the body. This surface also provides the origin for the masseter muscle.

Detailed explanation-4: -The unilateral contraction of the lateral pterygoid muscle with the ipsilateral medial pterygoid muscle results in lateral mandibular movement to the contralateral side. This movement is observable during functional and parafunctional lateral excursive movements, i.e., during chewing stroke, masticating, and clenching.

Detailed explanation-5: -The superior attachment point of the masseter muscle is the zygomatic arch. The masseter muscle is a powerful muscle of mastication with the following characteristics: Origin-zygomatic arch. Insertion-angle and lateral surface of the mandibular ramus.