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

Peculiarities claimed by the fourth bone

The fourth carpal bone [os pisiforme] (there is no need to identify the bones marginally hereafter, as the numbers are obvious in nearly all the figures of this chapter) does not touch the ulna, but on its upper surface it admits the portion of the ligament of this joint [l. ulnocarpale palmare]


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which originates from the sharp process [p. styloideus] of the epiphysis of the ulna. The tendon [m. flexor carpi ulnaris, tendo] (d in the 4th table of muscles) of the muscle which is reckoned the lower of those flexing the wrist is attached to the upper surface of the fourth bone. From its lower surface the muscle [m. abductor digiti minimi] (r in the 3rd table of muscles) originates by which the little finger is abducted from the others. Also, the muscle [m. flexor digiti minimi brevis] which is the outer of two that flex the first bone of the little finger takes a portion of its origin from this point.



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