What Is the Calcaneofibular Ligament?

Calcaneofibular ligament: It starts from the tip of the lateral malleolus, slants backwards and stops at the lateral side of the calcaneus, and is located deep in the long and short peroneus tendon. The main role is to limit the calcaneus inversion.

Calcaneofibular ligament: It starts from the tip of the lateral malleolus, slants backwards and stops at the lateral side of the calcaneus, and is located deep in the long and short peroneus tendon. The main role is to limit the calcaneus inversion.

Chinese name

Collateral ligament

Foreign name

Calcaneofibular ligament

Function

Limit calcaneal varus

Achilles ligament around the ankle ligament

The ligaments around the ankle joint can be divided into 3 groups according to their anatomical position: lateral collateral ligament, medial collateral ligament (triangular ligament), and lower tibiofibular joint ligament.

Lateral collateral ligament

The lateral collateral ligament complex includes: anterior fibula ligament, heel fibula ligament, and posterior fibula ligament.

1. Anterior talofilamental ligament: It starts from the front edge of the lateral malleolus, slants forward and down to the lateral side of the talus neck, and is 2 to 2.5mm thick. In neutral position, it is parallel to the long axis of the foot and perpendicular to the long axis of the calf. The main role is to limit the talus forward.

2. Achilles ligament: It starts from the tip of the lateral malleolus and runs obliquely backwards and stops at the lateral side of the calcaneus, located deep in the long and short peroneus tendon of the fibula. The main role is to limit the calcaneus inversion.

3. Posterior peroneal ligament: It starts from the posterior lateral malleolus fossa of the lateral malleolus and ends horizontally backward at the posterolateral talus. It is the strongest of the three bundles. The main role is to limit the talus backward.

Medial collateral ligament

Medial collateral ligament (triangular ligament): The triangular ligament works with other ankle joint structures to maintain ankle stability. The triangular ligament is a compound ligament with a fan-shaped structure consisting of shallow and deep layers. Including: Tibial Tibial Ligament (Front / Back), Tibial Heel Ligament, Tibiofibular Ligament.

Tibiofibular ligament

Inferior tibiofibular ligament: The distal articular surface of the tibia and fibula is composed of the convex surface of the distal fibula and the concave surface of the distal tibia, and is connected by the tibiofibular ligament. There is no cartilage structure in the joint. The distal tibiofibular ligament is composed of four parts of ligaments, including: interosseous ligament, inferior tibiofibular ligament, inferior tibiofibular ligament, and inferior transverse ligament.

The interosseous ligament is formed by thickening the distal end of the interosseous membrane. The lower tibiofibular anterior ligament starts from the anterolateral side of the tibial tuberosity and ends at the anterior side of the fibula spine. The posterior tibiofibular ligament starts from the back of the tibial spine and ends at the posterior margin of the lateral malleolus. The inferior transverse ligament forms the lower half of the posterior tibiofibular ligament and can be considered as part of the posterior tibiofibular ligament.

The inferior tibiofibular ligament and inferior tibiofibular ligament have the greatest effect on the stability of the ankle joint, followed by the interosseous membrane and the superficial layer of the inferior tibiofibular ligament.