- First metatarsal bone
Infobox Bone
Name = First metatarsal bone
Latin = os metatarsale I
GraySubject = 64
GrayPage = 272
Caption = The first metatarsal. (Left.)
Caption2 = Bones of the right foot. Dorsal surface.
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The first metatarsal bone is the bone in the body of the foot just behind the big toe.It is remarkable for its great thickness, and is the shortest of the
metatarsal bones.The body is strong, and of well-marked prismoid form.
The base presents, as a rule, no articular facets on its sides, but occasionally on the lateral side there is an oval facet, by which it articulates with the
second metatarsal .Its proximal articular surface is of large size and
kidney -shaped; its circumference is grooved, for thetarsometatarsal ligaments , and medially gives insertion to part of the tendon of theTibialis anterior ; its plantar angle presents a rough oval prominence for the insertion of the tendon of thePeronæus longus .The head is large; on its plantar surface are two grooved facets, on which glide
sesamoid bones ; the facets are separated by a smooth elevation.
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