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

Number of processes in the lumbar vertebrae

Thus the lumbar vertebrae in humans have seven processes: one in the posterior or spine, two transverse, two ascending, and two descending. Simians have two more, which we have said are next to the roots of the transverse processes, so that they have nine processes. Some have counted that many in man by subdividing each of the ascending processes into two by virtue of the depression [facies articularis] between them (those two would be M, L in figs. 2, 3; the depression is K). But by this logic there would be eleven processes growing in the lumbar vertebrae of simians. Moreover, we should not fail to mention that Galen, inconsistently describing the foramina hollowed out for the nerves in the thirteenth book of De usu partium, does not seem to imagine a special process in the lumbar vertebrae when he attributes to the descending processes of the lumbar vertebrae the function which he elsewhere attributed to the process that we have said is simian. 20



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