The superior border is long, thin, and sharp, and serves for the attachment of the temporal fascia; the inferior, short, thick, and arched, has attached to it some fibers of the masseter. The lateral surface is convex and subcutaneous; the medial is concave, and affords attachment to the masseter. The anterior end is deeply serrated and articulates with the zygomatic bone.
The superior border is long, thin, and sharp, serving as a point for attaching the temporal fascia; the inferior border is short, thick, and arched, connecting to fibers of the masseter. The lateral surface is convex and beneath the skin; the medial surface is concave, providing attachment to the masseter. The anterior end is deeply serrated and articulates with the zygomatic bone.