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 29 On the Bones Which Are Attached to the Sides of the Sacrum

Projections of the depression

At either side of this depression, a single tubercle (the outer one marked S, the inner X in figs. 1, 2, 3) stands out rather prominently, increasing the depression and preventing the muscles descending this way from leaving the depression. But in addition to this use, the tubercle [spina iliaca anterior inferior] at the outer side of the depression 41 puts forth the ninth (F in the 4th table of muscles) [m. rectus femoris] of the muscles that move the tibia; because of this use it is quite large and uneven, having a small dimple (S is placed on the dimple in the first figure) like a cleft from which that strong muscle originates. The other tubercle [eminentia iliopubica], constituting the inner side of the depression just mentioned, provides considerable strength to the hipbone which needs to be thick and strong not only for the sake of a robust articulation but also because it had to be carved from the deepest socket [acetabulum] in the entire body, to which the femur is articulated.



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 29 On the Bones Which Are Attached to the Sides of the Sacrum