(Chapter 16) Footnote 60:

Paraphrased from De usu partium 4.78.29-79.8: “With good reason, then, just as this vertebra has a special position ... so its articulations are special too; for in order that the whole spine might bend uniformly it was of course necessary for the middle vertebra to remain in place while all the others withdrew gradually from one another and from it, the upper ones retiring upward and the lower ones down.” (tr. May 1968 p. 588). The appropriation of this Galenic text strikes an ironic note in a chapter so given to refuting Galen, and the irony is compounded by the claim of independence from Galen that comes two sentences later.