Zygomatic process of temporal bone

The zygomatic process of temporal bone starts as a flat shape on the lower section of the squamous part, having a concave upper surface. This triangular region is framed by anterior and posterior roots that grow out from the squamous segment and join on the side. Proceeding forward, the zygomatic process slightly twists, reorienting its surfaces from superior and inferior to medial and lateral. Where the roots converge, on their underside, there's an articular eminence and an articular tubercle. The eminence forms the anterior boundary of the mandibular fossa and the tubercle offers attachment to the lateral ligament of the temporomandibular joint. Above the external acoustic meatus, the posterior root blends into the supramastoid crest. Occasionally, a hole known as the squamosal foramen can be found above the posterior root, allowing for the passage of the petrosquamosal sinus.

The zygomatic process's front section is narrow and flat, with the temporal fascia connecting to its top edge. Its bottom edge is short and curved, from which masseter muscle fibers originate. The outer face is rounded, while the inner face is hollowed, allowing additional masseter fibers to attach. The anterior of zygomatic process of temporal bone articulates with the temporal process of the zygomatic bone, at the temporozygomatic suture, forming the zygomatic arch.