Cuboid bone

Cuboid bone
The left cuboid. Antero-medial view.
The left cuboid. Postero-lateral view
Latin	Os cuboideum
Gray's	p.269
Articulations	Calcaneocuboid, cuboideonavicular and cuneocuboid articulation
MeSH	Cuboid+Bone
TA	A02.5.16.001
FMA	FMA:24527

In the human body, the cuboid bone is one of the seven tarsal bones of the foot.

Surfaces

The dorsal surface, directed upward and lateralward, is rough, for the attachment of ligaments.

The plantar surface presents in front a deep groove, the peroneal sulcus, which runs obliquely forward and medialward; it lodges the tendon of the peroneus longus, and is bounded behind by a prominent ridge, to which the long plantar ligament is attached.

The ridge ends laterally in an eminence, the tuberosity, the surface of which presents an oval facet; on this facet glides the sesamoid bone or cartilage frequently found in the tendon of the peroneus longus. The surface of bone behind the groove is rough, for the attachment of the plantar calcaneocuboid ligament, a few fibers of the flexor hallucis brevis, and a fasciculus from the tendon of the tibialis posterior.

The lateral surface presents a deep notch formed by the commencement of the peroneal sulcus.

The posterior surface is smooth, triangular, and concavo-convex, for articulation with the anterior surface of the calcaneus (the calcaneocuboid joint); its infero-medial angle projects backward as a process which underlies and supports the anterior end of the calcaneus.

The anterior surface, of smaller size, but also irregularly triangular, is divided by a vertical ridge into two facets, forming the fourth and fifth tarsometatarsal joints: the medial facet, quadrilateral in form, articulates with the fourth metatarsal; the lateral, larger and more triangular, articulates with the fifth.

The medial surface is broad, irregularly quadrilateral, and presents at its middle and upper part a smooth oval facet, for articulation with the third cuneiform; and behind this (occasionally) a smaller facet, for articulation with the navicular bone; it is rough in the rest of its extent, for the attachment of strong interosseous ligaments.

^[1]

Muscle attachments

Only two muscles attach to the cuboid bone; the flexor hallucis brevis^{[citation needed]} and tibialis posterior. The tibialis posterior inserts to the under surface of the cuboid bone.^[2] While the flexor hallucis brevis arises, by a pointed tendinous process, from the medial part of the under surface of the cuboid bone, from the contiguous portion of the lateral cuneiform bone, and from the prolongation of the tendon of the tibialis posterior.^{[citation needed]}

Injuries

In a condition known as cuboid syndrome, the cuboid can be subluxated downward causing a swollen kind of ache along the central portion of the lateral border of the foot.

See also

• Bone terminology
• Terms for anatomical location
• Knucklebones (precursor of gaming dice)

Additional images

Cuboid  Bones of the right foot. Plantar surface.  Skeleton of foot. Lateral aspect.  Talocalcaneal and talocalcaneonavicular articulations exposed from above by removing the talus.  Oblique section of left intertarsal and tarsometatarsal articulations, showing the synovial cavities.  Bones of foot, in German and Latin  Ankle joint. Deep dissection. Medial view.  Ankle joint. Deep dissection. Lateral view.  Ankle joint. Deep dissection.  Ankle joint. Deep dissection.  Ankle joint. Deep dissection.  Ankle joint. Deep dissection.  Ankle joint. Deep dissection.  Ankle joint. Deep dissection.  Knee, tibiofibular and ankle joints.Deep dissection. Anterolateral view.  Knee, tibiofibular and ankle joints.Deep dissection. Anterolateral view.  Ankle and tarsometarsal joints. Bones of foot.Deep dissection.  Ankle and tarsometarsal joints. Bones of foot.Deep dissection.  Ankle joint. Bones of foot.Deep dissection.  Ankle joint. Bones of foot.Deep dissection.  Ankle and tarsometatarsal joint. Deep dissection.Anterior view

References

This article incorporates text from a public domain edition of Gray's Anatomy.

Wikimedia Commons has media related to Cuboid Bone.