Cuboid

The cuboid bone is one of the tarsal bones located lateral to the lateral cuneiform bone and has an important articulation with the calcaneus.

Osteology

The cuboid is a wedge shaped bone, being widest at its medial edge and narrow at its lateral edge. It has three main articular surfaces: anterior, medial and posterior.

Its anterior surface is separated into two facets by a vertical ridge, allowing articulation of the base of the fourth and fifth metatarsal.

Its medial surface is oval in shape, allowing articulation with the lateral cuneiform and sometimes the navicular.

The inferior (or plantar) surface of the cuboid has a tuberosity, where the peroneus longus muscles passes to insert into the first metatarsal and medial cuneiform.

Articulations
  • calcaneus via the calcaneocuboid joint: the posterior cuboid articulates with the anterior surface of the calcaneus
  • lateral two metatarsals via the metatarsocuboid articulations: the anterior cuboid articulates with the base of the lateral two metatarsals
  • lateral cuneiform via the cuneocuboid articulation: medial edge of cuboid articulates with the lateral edge of the lateral cuneiform
  • navicular via the cuboideonavicular articulation: sometimes the medial edge of cuboid articulates with the navicular
Attachments
Musculotendinous

Flexor hallucis brevis - this muscle arises from the medial cuboid, adjacent lateral cuneiform and tibialis posterior tendon.

Ligamentous
Relations
  • lateral longitudinal arch: consists of calcaneus, cuboid and lateral two metatarsal bones, from posterior to anterior
  • transverse arch: consists of the bases of the metatarsal bones, cuboid and all cuneiforms

Arterial supply is via the lateral tarsal artery, a branch of the dorsalis pedis.

An additional os vesalianum bone may arise between the fifth metatarsal and cuboid.

Ossification

The cuboid ossifies in cartilage at the ninth month.

Cuboid syndrome describes pain associated with damage to the calcaneocuboid joint and associated ligaments.

Lower limb anatomy
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Article information

rID: 41549
Section: Anatomy
Synonyms or Alternate Spellings:

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