Lateral Cuneiform

It lies between the intermediate cuneiform and cuboid. It articulates proximally with the navicular and distally with the base of third metatarsal bone.

Lateral Cuneiform

Lateral Cuneiform

Structure of Lateral Cuneiform:

It consists of the following surfaces.

  • Dorsal surface: It is rough and almost rectangular. It forms the base of wedge.
  • Plantar surface: It is narrow and receives a slip for tendon of tibialis posterior.
  • Distal surface: It is the triangular articular facet for the base of third metatarsal bone.
  • Proximal surface: It is rough on its plantar aspect, while its dorsal aspect is articular, joining with the navicular through a triangular facet.
  • Medial surface: It is partly non articular. The proximal margin of it is indented for the intermediate cuneiform.
  • Lateral surface: It is also partly non-articular and bears a triangular facet for the cuboid bone. There is also an additional semi-lunar facet for articulation with medial side of the base of fourth metatarsal bone.

Blood supply of lateral cuneiform:

The lateral cuneiform is supplied via its dorsal, medial and lateral surfaces, mainly from the dorsal arterial network.

Nerve supply to lateral cuneiform:

The lateral cuneiform is innervated by branches of the deep peroneal and lateral plantar nerves.

Ossification of lateral cuneiform:

The center of ossification for the lateral cuneiform appears during the first year of life.