Lateral cuneiform

The lateral cuneiform is one of the tarsal bones located between the intermediate cuneiform and cuboid bones.

Osteology

The lateral cuneiform is a wedge shaped bone. It is smaller than the medial cuneiform and larger than the intermediate cuneiform. It lies edge downward, between the intermediate cuneiform and cuboid.

Articulations
  • anteriorly with the 2nd and 3rd metatarsals
  • posteriorly with the navicular
  • laterally with the cuboid
  • medially with the intermediate cuneiform
Attachments
Musculotendinous
  • flexor hallucis brevis: the proximal part of the lateral cuneiform undersurface gives rise to this muscle
  • tibialis posterior: one of its fibrous terminal tendon slips attaches to the narrow plantar surface
Ligamentous
  • plantar interosseous ligaments: arise from the lower part of the lateral cuneiform, forming part of the transverse arch of the foot, these are mainly cuneocuboid ligament and intercuneiform ligaments which help gliding and rotation in pedal pronation or supination and also when the forefoot is stressed, as in initial thrust of running and jumping
Relations
  • anterior: 2nd and 3rd metatarsal
  • posterior: navicular
  • lateral: cuboid
  • medial: intermediate cuneiform
Ossification

The lateral cuneiform ossifies in the first year of life.

Isolated lateral cuneiform fracture is rare, but has been documented in the literature 1,

Lower limb anatomy
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Article Information

rID: 41547
Section: Anatomy
Synonyms or Alternate Spellings:
  • Third cuneiform
  • External cuneiform
  • Cuneiforme lateral

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Cases and Figures

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