Plantar calcaneocuboid ligament

Anatomical structure of the foot

Plantar Calcaneocuboid Ligament

Illustration of the plantar calcaneocuboid ligament

The plantar calcaneocuboid ligament is a significant ligament located in the foot. It plays a crucial role in maintaining the stability of the foot by connecting the calcaneus (heel bone) to the cuboid bone. This ligament is part of the plantar ligament complex, which supports the arch of the foot.

Anatomy

The plantar calcaneocuboid ligament is a short, strong band that extends from the anterior tubercle of the calcaneus to the plantar surface of the cuboid bone. It is situated on the lateral side of the foot and is one of the key structures that contribute to the lateral longitudinal arch.

Function

The primary function of the plantar calcaneocuboid ligament is to stabilize the lateral side of the foot. It helps in maintaining the integrity of the lateral longitudinal arch and prevents excessive movement between the calcaneus and the cuboid bone. This ligament also assists in the distribution of weight across the foot during standing and walking.

Clinical Significance

Injuries to the plantar calcaneocuboid ligament can occur due to trauma or overuse. Such injuries may lead to pain and instability in the lateral aspect of the foot. Conditions such as cuboid syndrome can arise from dysfunction of this ligament, leading to difficulty in walking and weight-bearing activities.

Related Structures

The plantar calcaneocuboid ligament is closely associated with other structures in the foot, including:

• The long plantar ligament, which runs parallel to it and also supports the arch of the foot.
• The bifurcate ligament, which connects the calcaneus to the cuboid and navicular bones.
• The peroneus longus tendon, which passes underneath the cuboid bone and is supported by the plantar calcaneocuboid ligament.

Related pages

• Foot anatomy
• Ligaments of the foot
• Cuboid bone
• Calcaneus