Cuboid

A wrist bone that plays a crucial role in the structure and function of the foot.

The cuboid is one of the seven tarsal bones located in the foot. It is a cube-shaped bone that provides stability and support to the lateral aspect of the foot, specifically articulating with the fourth and fifth metatarsal bones. The cuboid also connects with the calcaneus (heel bone) and the navicular bone, forming essential joints that facilitate movement.

Terminologia Anatomica

os cuboideum

System

Skeletal system

Function

The primary function of the cuboid bone centers around providing structural support and facilitating movement within the foot. As a key component of the lateral column of the foot, it helps to transfer weight during activities such as walking and running. Its articulations with neighboring bones allow for effective mobility and shock absorption, essential for maintaining balance and posture. The cuboid also serves as an anchor point for tendons of specific muscles, which contribute to foot movements, such as eversion and stabilization during the gait cycle.

Location

The cuboid is situated on the lateral side of the foot, nestled between the calcaneus and the fourth and fifth metatarsal bones. It lies posterior to the fourth and fifth metatarsals and anterior to the calcaneus. This positioning places the cuboid strategically to assist in weight distribution and movement, allowing for smooth transitions during locomotion. Its proximity to other tarsal bones enables it to play a vital role in forming the midfoot's functional architecture.

Did You Know?

The cuboid bone can sometimes be a site for pain, known as cuboid syndrome, often resulting from excessive stress or injury.
In some individuals, the shape of the cuboid bone can vary, affecting the overall mechanics of the foot.
The cuboid bone has been found to be involved in conditions such as flat feet, where its support role becomes especially important.