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 6 On the Eight Bones of the Head and the Sutures Connecting Them

The jugal process of the temporal bone

In addition to these, still another process (X in figs. 3, 4, 5) in the temporal bone, by no means the lowest, forms half of the jugal bone. In the next chapter you will hear that it is nothing other than processes [os temporalis, processus zygomaticus] [os zygomaticum, processus temporalis] of two bones joined by an oblique suture [sutura temporozygomatica] (Z in figure 3, Y in figure 5). At the base of this process, in front of the auditory passage, a depression (h in figures 4 and 5) [fossa mandibularis] is carved in the bone, 108 into which the capitulum [processus condylaris, caput mandibulae] of the lower maxilla [mandibula] is articulated. Here too [the bone at] the beginning of the auditory passage [meatus acusticus externus], which is very thick, is separated from the rest of the temporal bone by a kind of small, obscure suture (r in figures 4 and 5) [fissura petrotympanica] at some point, chiefly in the lower anterior area. The remaining expanse of bone [os temporale, pars squamosa] can be seen facing the vertex, broad and quite thin but solid and free of pores, smooth on the outside but swelling unevenly on the inside like the convolutions of the brain which resemble the twists of the intestines. Near the base of the head it [os temporale, pars petrosa] is rough and quite uneven, particularly where like a process [apex partis petrosae] it faces the transverse line [synchondrosis sphenopetrosa] common to the occiput and the cuneiform bone (∫[s] in figure 5). At this point it projects unevenly, is rough like pumice, and pierced by a transverse foramen [canalis caroticus] by which you will hear the principal branch of the sleep artery [arteria carotis interna] is carried into the skull.



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 6 On the Eight Bones of the Head and the Sutures Connecting Them