Masseter - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The masseter is a muscle of mastication (chewing). It is quadrangular in shape and has two parts – deep and superficial. Attachments: The superficial part originates from maxillary process of the zygomatic bone. The deep part originates from the zygomatic arch of the temporal bone. Both parts attach to the ramus of the mandible. Actions: Elevation of the mandible (closes the mouth). Innervation: Mandibular nerve (V3). Blood Supply: Masseteric artery (branch of maxillary artery). By TeachMeSeries Ltd (2026) Fig 1The masseter muscle. Only the superficial head is visible Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Pro Feature - Dissection Atlas Prosection of the parotid gland and surrounding structures. Note the close anatomical relationship between the parotid gland and the facial nerve. Prosection of the parotid gland and surrounding structures. Note the close anatomical relationship between the parotid gland and the facial nerve. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the masseter muscle and what is its primary function? The masseter muscle is a key muscle involved in mastication, primarily responsible for elevating the mandible to close the mouth during chewing. What are the attachments of the masseter muscle? The masseter has two parts: the superficial part originates from the maxillary process of the zygomatic bone, while the deep part arises from the zygomatic arch of the temporal bone, both attaching to the ramus of the mandible. What is the innervation of the masseter muscle? The masseter muscle is innervated by the mandibular nerve, which is the third division of the trigeminal nerve (V3). What is the blood supply to the masseter muscle? The masseter receives its blood supply from the masseteric artery, a branch of the maxillary artery. What are the anatomical characteristics of the masseter muscle? The masseter is quadrangular in shape and consists of two distinct parts: a superficial and a deep portion, both contributing to its function in chewing. Rate This Article