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

How many bones make up the eye socket

The upper part [pars orbitalis] of this socket (I in the left eye socket, fig. 1) is made up of the frontal bone. Its apex (G, H in fig. 1), which is forced into a narrow shape like a cone or a pyramid, is part [ala major ossis sphenoidalis] of the cuneiform bone, which also forms a large (but deep) portion of the outside [paries lateralis orbitae] of the eye socket, so that there is no reason not to count the cuneiform bone the second bone and the frontal bone the first in the eye socket. The third bone (G in fig. 1) of the eye socket is counted the first [os zygomaticum] of the upper maxilla because it makes up the entire outer angle of the eye socket and half of its lower circumference, the remainder of which (L in fig. 1) as far as the area between the eyebrows is occupied by the largest or fourth bone [maxilla] of the maxilla. This bone, fourth among the bones making up the eye socket, constitutes more or less the entire lower part of its area. The fifth bone [os lacrimale] of the eye socket (D in fig. 1) is in its inner angle towards the front near its edge; it is the second of the maxillary bones. The sixth (O in figs. 1 and 2) [lamina orbitalis ossis ethmoidalis] of the bones of the eye socket lies in its inner side; located behind the bone just mentioned, we consider it the third of the maxillary bones. Thus, two bones of the eye socket, the first two, count as bones of the head, and four belong to the upper maxilla, viz., the last four mentioned. After you have carefully studied these six bones in the eye socket and inspected the sutures bordering them, it will be possible in this way to outline each separate bone of the maxilla precisely at its sutures.



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