From Surf Wiki (app.surf) — the open knowledge base

Third metatarsal bone

Long bone in the foot

Field	Value
Name	Third metatarsal bone
Latin	os metatarsale III
Image	Gray286.png
Caption	The third metatarsal. (Left.)
Image2	Ospied-en.svg
Caption2	Bones of the right foot. Dorsal surface. Third metatarsal bone is the yellow bone third from the left

The third metatarsal bone is a long bone in the foot. It is the second longest metatarsal, the longest being the second metatarsal. The third metatarsal is analogous to the third metacarpal bone in the hand

Like the four other metatarsal bones, it can be divided into three part: base, body and head. The base is the part closest to the ankle and the head is closest to the toes. The narrowed part in the middle is referred to as the body of the bone. The bone is somewhat flattened, giving it two surfaces: the plantar (towards the sole of the foot) and the dorsal side (the area facing upwards while standing). These surfaces are rough for the attachment of ligaments. The bone is curved longitudinally, so as to be concave below, and slightly convex above.

The base or posterior extremity is wedge-shaped. The third metatarsal bone articulates proximally, by means of a triangular smooth surface, with the third cuneiform; medially, by two facets, with the second metatarsal; and laterally, by a single facet, with the fourth metatarsal. This last facet is situated at the dorsal angle of the base.

The head or anterior extremity articulates with the third proximal phalanx.

Muscle attachments

[[File:Gray268.png	thumb	130px	Muscle attachments (seen from above)]]	[[File:Gray269.png	thumb	130px	Muscle attachments (seen from below)]]

The second and third dorsal interossei muscles attaches to the third metatarsal bone. The second dorsal interossei from the medial side of the bone and the third dorsal interossei from the lateral side. The function of the muscle is to spread the toes.

The first Plantar interossei muscle originates from the medial side of the base and shaft of the third metatarsal. The function of the muscle is to move the third toe medially and move the toes together.

The horizontal head of the adductor hallucis also originates from the lateral side of the metacarpophalangeal joint and from the deep transverse metatarsal ligament, a narrow band which runs across and connects together the heads of all the metatarsal bones.

Muscle		Direction		Attachment
Dorsal interossei II
Dorsal interossei III
Plantar interossei I
Horizontal head of adductor hallucis

Additional images

File:Footx.jpg|X-ray of foot, showing phalangeal fracture File:Gray290.png|Skeleton of foot. Medial aspect. File:Gray360.png|Oblique section of left intertarsal and tarsometatarsal articulations, showing the synovial cavities. File:Foot bones - tarsus, metatarsus.jpg|Foot bones - tarsus, metatarsus File:Foot bones - metatarsus and phalanges.jpg|Foot bones - metatarsus and phalanges File:Metatarsus.jpg|Metatarsus

References

Bojsen-Møller, Finn. (2001). "Bevægeapparatets anatomi".
Bojsen-Møller, Finn. (2001). "Bevægeapparatets anatomi".
Bojsen-Møller, Finn. (2001). "Bevægeapparatets anatomi".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

bones-of-the-lower-limb bones-of-the-foot metatarsal-bones

Want to explore this topic further?

Ask Mako anything about Third metatarsal bone — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report