Deltoid ligament

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Ligament of the inner ankle

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The deltoid ligament, also known as the medial ligament of the ankle, is a strong, flat, triangular band located on the medial side of the ankle. It is attached above to the apex and anterior and posterior borders of the medial malleolus of the tibia and below to the talus, calcaneus, and navicular bone.

Anatomy

The deltoid ligament is composed of superficial and deep layers. The superficial layer consists of the following components:

• Tibionavicular ligament
• Tibiocalcaneal ligament
• Posterior tibiotalar ligament

The deep layer includes the:

• Anterior tibiotalar ligament

Function

The primary function of the deltoid ligament is to provide stability to the medial aspect of the ankle joint. It prevents excessive eversion of the foot and maintains the integrity of the joint during weight-bearing activities.

Clinical significance

Injuries to the deltoid ligament are less common compared to the lateral ligament of the ankle, but they can occur due to severe ankle sprains or fractures. Damage to this ligament can lead to medial ankle instability and may require medical intervention such as physical therapy or, in severe cases, surgery.

See also

• Lateral ligament of the ankle
• Ankle joint
• Tibia
• Talus bone
• Calcaneus
• Navicular bone