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 17 On the Lumbar Vertebrae

The transverse processes

The transverse processes of these vertebrae (H in figs. 1, 2, 3), one on each side, are much thinner than those of the thoracic vertebrae (H, I in figs. 1 and 2, ch. 16). But at the same time they are quite extended as if to perform the function of ribs in the loins. The first and fifth lumbar vertebrae have shorter transverse processes than the middle ones (this is shown in the first skeleton). 5 In none of them do the transverse processes angle visibly upward, save those of the fifth vertebra: the bones of the groin [os ilii] (Q and o in the first skeleton) prevent these from being extended transversely like the others. Those bones come closer to that vertebra than the length of the transverse processes in the middle lumbar vertebrae.




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 17 On the Lumbar Vertebrae