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  • sesamoid
  • On its volar surface are two articular eminences, of which the lateral is the larger, for the two sesamoid bones in the tendons of the flexor pollicis brevis muscle . (wikidoc.org)
  • Its distal tendon ends in three slips that are inserted into the ulnopalmar margin of the proximal phalanx, the palmar plate of the metacarpophalangeal joint, and the sesamoid bone when present. (wikipedia.org)
  • It has 27 bones, not including the sesamoid bone, the number of which varies between people, 14 of which are the phalanges (proximal, intermediate and distal) of the fingers and thumb. (wikipedia.org)
  • palmar
  • The peripheral metacarpals (those of the thumb and little finger) form the sides of the cup of the palmar gutter and as they are brought together they deepen this concavity. (wikipedia.org)
  • Palmar view of the left hand (fourth metacarpal shown in yellow). (wikipedia.org)
  • The palmar surface is similarly divided: Its lateral side (facing the fourth metacarpal) provides origin for the third palmar interosseus, its medial side contains the insertion of opponens digiti quinti. (wikipedia.org)
  • volar
  • The first metacarpal bone ( metacarpal bone of the thumb ) which connects to the thumb is shorter and stouter than the others, diverges to a greater degree from the carpus, and its volar surface is directed toward the palm. (wikidoc.org)
  • pisiform
  • The abductor digiti minimi arises from the pisiform bone, the pisohamate ligament, and the flexor retinaculum. (wikipedia.org)
  • base
  • The metacarpal bone of the thumb has two centres of ossification: a primary centre in the shaft and a secondary centre in the base. (wikipedia.org)
  • When the both sexes were considered together, the ossification of base of first metacarpal was seen to start between 13 and 41 months. (wikipedia.org)
  • Ossification of Distal end of Radius & Base of First Metacarpal in Forensic Age Estimation in the Kerala Population" (PDF). (wikipedia.org)
  • deformity
  • Leave it be with a plaster, bones will join, but with deformity, as the size of that bone will reduce because of diagonal breakage 2. (practo.com)