(Chapter 31) Footnote 27:

The term is Hippocratic, e.g. in De fracturis 18.1: “Of the lower leg bones, the inside of the so-called antiknēmion is the more troublesome to treat” (from the Loeb tr. of E.T. Withington). Cf. Aristotle HA 494a6: “The double-boned part of the leg is the knēmē, of which the front is the antiknēmion . . .” (from the Loeb tr. of A.L. Peck).