(Chapter 25) Footnote 1:

As in the preceding chapter, Vesalius presents his illustrations with the proximal end down, contrary to the practice of his own time (e.g., Canano’s Musculorum humani corporis picturata dissectio, ca. 1541) and contrary to modern convention. In the text, however, the orientation is reversed: proximal bones are “upper,” and distal bones “lower.”