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 25 On the Carpus

To what row it should be assigned

We assign it to the upper row because it is articulated to the third bone of this row, and this is in fact the row in which it stands. Anatomists name it the cartilaginous bone, 32 the same name Marinus 33 gave to the bone [patella] (figs. 1, 2, ch. 32, C in the skeletons) in front of the knee joint which we call the mola 34 or patella. It is not (I believe) because they thought this bone to be soft and cartilaginous, since it is easily the hardest and most solid of all the bones of the carpus, but because when cooked its outside appears covered with cartilage on account of the origins of muscles and ends of tendons which after boiling resemble slightly soft cartilage. Galen appears to have counted this the eighth carpal bone, 35 attributing this property to it, that it is a bulwark for a certain nerve [ramus palmaris nervi ulnaris] (46 in fig. 2, ch. 11, bk. 4) that is bent from the inner part of the hand to the outer around this carpal bone. 36 I am not unaware of this nerve, but in humans it does not bend upon this ossicle. This is the nerve [n. ulnaris] from the fifth of the nerves 37 going to the arm that you will be told in the fourth book extends posteriorly from the inner side of the forearm a little after the midpoint, putting forth two twigs [n. digitalis palmaris proprius, n. digitalis palmaris communis] to the little finger, the same number 38 to the ring finger, and one [r. communicans cum nervo ulnari] to the middle. This nerve does not touch the fourth carpal bone, much less is it bent around it from the inside of the hand to the outside. 39 Except for the fourth carpal bone, there is not a single one that is not attached and contiguous to several bones. 40



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 25 On the Carpus