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Finger bones (phalanxes)

The bones of the fingers (phalanges), ossa digitorum (phalanges), are represented by phalanges, phalanges, referring to long bones. The first, large, finger has two phalanges: proximal, phalanx proximalis. And distal, phalanx distalis. The remaining fingers have an average phalanx, phalanx media. In each phalanx the body and two epiphyses are distinguished - proximal and distal.

Finger bones (phalanxes)

The body, corpus, of each phalanx from the anterior (palmar) side is flattened. The surface of the body of the phalanx is limited at the sides by small scallops. On it there is a nutrient aperture extending into the distally directed nutrient channel.

The upper, proximal, end of the phalanx, or base, basin phalangis, is thickened and has articular surfaces. The proximal phalanges are articulated with the bones of the pastern, and the middle and distal phalanges are joined together.

The lower, distal, end 1 and 2 phalanges have a phalanx head, caput phalangis.
At the lower end of the distal phalanx, on the back, there is a slight roughness - tuberosity of the distal phalanx, tuberositas phalangis distalis.

In the area of ​​the metacarpophalangeal joints of the 1st, 2nd and 5th fingers and interphalangeal articulation of the first finger on the palmar surface, in the thickness of the tendons of the muscles, there are sesamoid bones, ossa sesamoidea.

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