Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 9 On the Twelve Bones of the Upper Maxilla, Including the Bones of the Nose

The first bone of the maxilla

The first bone [os zygomaticum] of the upper maxilla (G, G in figs. 1 and 2) is one part of the jugal bone [arcus zygomaticus] and includes much of the temple and the rim and socket of the eye, which is to say its entire outer angle, forming no small part of the mala (cheek) as well. This first bone [os zygomaticum, processus temporalis] of the maxilla is joined to the temporal bone [os temporale, processus zygomaticus] by a suture [sutura temporozygomatica] (P in fig. 1, Y in fig. 2) which joins the two processes constituting the jugal bone. Then it is joined


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to the cuneiform bone by the suture [sutura sphenozygomatica] (d in figs. 3 and 4, chapter 6) which is brought sloping down through the hollows of the temples [regio infratemporalis] and is visible also in the eye socket (Q in fig. 1); the suture is common to this first bone of the maxilla and the cuneiform bone. In its upper part it is knit [sutura frontozygomatica] (R in fig. 1) to the frontal bone, at the point that is considered the end of the eyebrow. This joint is made by the suture (R, S, T, V, X, Y, Z in fig. 1) that is brought from the hollow of the temples through the eye sockets to the area between the brows, and separates the frontal bone from the upper maxilla and the cuneiform. 33 Being in its lower portion of conspicuous breadth, the first bone is attached to the fourth by a suture [sutura zygomaticomaxillaris] which is visible in three places: in the hollow of the temples beneath the jugal bone (ff in ch. 6, fig. 4), in the anterior region of the maxilla next to the cheek (from a to b in fig. 1), and in the lower part of the eye socket (from b through D to Q in fig. 1). The part of the suture visible in the hollow of the temples begins from the lower part of the suture [sutura sphenozygomatica] dividing the cuneiform bone from the first bone of the maxilla. From that end, this suture is carried obliquely downward and slightly forward until it reaches the lowest part of the cheek (a in fig. 1), where it is rough and uneven. The part of this suture appearing in the anterior part of the maxilla runs obliquely from the cheek upward to the eye socket, toward the middle region of the lower perimeter surrounding the eye socket here. The part or interval of this suture joining the first bone to the fourth that is visible in the eye socket ascends from the middle of the lower perimeter of the eye socket obliquely backwards through its lower parts [paries inferior orbitae] towards the outside [margo lateralis] until it reaches the lowest part of the suture separating the cuneiform bone from the first maxillary. In this way the first bone is circumscribed, joined (as we have said) to four bones: to the process [processus zygomaticus] of the temporal bone that forms one part of the jugal bone, then to the cuneiform bone, the frontal bone, and the fourth maxillary bone.



Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 9 On the Twelve Bones of the Upper Maxilla, Including the Bones of the Nose