The cuboid bone is one of the seven tarsal bones located on the lateral side of the foot. This bone is cube-shaped and connects the foot and the ankle. It also provides stability to the foot. This multi-faceted bone is positioned between the fourth and fifth metatarsals and the calcaneus. Each surface is distinct and serves a specific purpose. The rough dorsal surface is attached to the ligaments in the foot. The plantar surface, located at the front of the foot, has a deep groove for the plantar ligament and the peroneus longus tendon. The lateral surface has a deep notch formed by the peroneal sulcus, while the posterior surface is smooth and triangular so it can articulate with the calcaneus' anterior surface. The anterior surface is smaller and irregularly triangular, divided into two different facets in order to accommodate the tarsometatarsal joints. The medial surface of the cuboid bone is quadrilateral and broad with an oval facet that allows it to articulate with the third cuneiform and the navicular bone. This bone impacts on the stability of the foot and the articulation of the toes, in addition to ensuring proper weight distribution and flexibility along the plantar fascia.
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In Depth: Cuboid