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 4 On the Structural Relationships of Bones

Obscure motions

The motion of other joints is neither vigorous nor obvious, but obscure and so difficult to perceive and hidden that individual motions cannot by any means be readily distinguished. The movement of the joint of the metacarpal and carpal bones is not obvious to anyone. But if you first stretch the fingers along a level surface and then place the little finger under the middle finger and the ring finger so as to make an X figure and attempt to form a kind of semicircle with the roots of the fingers, the metacarpal bones will not appear utterly immobile. The same thing occurs also in the joints of the carpal bones with each other, 18 of the calcaneus with the talus, of the talus with the navicular bone, and again of this with the three bones 19 [os cuneiforme mediale, intermedium, laterale] of the tarsus, of the calcaneus with the cuboid bone of the tarsus, and of the bones of the tarsus with the metatarsal bones. Unless you observed very closely, you would not notice even the most obscure motion. 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 4 On the Structural Relationships of Bones