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 3 Names by which the Parts and Surfaces of Bones are Identified

Baqmi/dej: hollows

Baqmi/dej are 64 cavities that like a base or brace prevent a bone from being moved at all beyond what is useful to the creature. In the anterior part [fossa coronoidea] of the humerus (N in figure 1, Chapter 23) and in the posterior [fossa olecrani] (O in figure 2, Chapter 23) a cavity is carved, each receiving a process of the ulna (C and D in figure 1, Chapter 24) [processus coronoideus, olecranon]. The anterior cavity [fossa coronoidea] admits the forward process of the ulna when the forearm in fully flexed; the posterior cavity [fossa olecrani] admits the posterior process of the ulna in extensions of the forearm. Since the posterior cavity does not admit passage into the anterior, they prevent the ulna from being moved at all beyond what is useful. If they were interconnected and did not obstruct the processes, we could extend our forearm as readily into an acute angle as we now bend it. And so the first professors of dissection justifiably termed these cavities baqmi/dej, though Hippocrates used the term not only for this kind of cavity but also for others into which protuberances that enter the bones become embedded. 65 He called the C-shaped cavity [incisura trochlearis] which the furrow of the humerus enters a baqmi/j, as others term the joint [articulatio cubiti] of the rest of the elbow. Those cavities that I first described in the humerus claim solely for themselves a feature they have almost alone of all the cavities that receive the processes of another bone in the movement of joints: they are covered with almost no cartilage.



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 3 Names by which the Parts and Surfaces of Bones are Identified