Ligament of the Head of the Fibula Posterior

The posterior ligament of the head of the fibula (lat. ligamentum capitis fibulae posterius) is one of the ligaments of the knee joint.

This ligament originates from the posterior surface of the lateral condyle of the tibia and attaches to the posterior surface of the head of the fibula. It strengthens the knee joint at the back, limiting posterior displacement of the head of the fibula.

The posterior ligament of the head of the fibula, together with the anterior ligament of the head of the fibula and the ligament of the fibula proper, fix the head of the fibula in the condyle of the femur, ensuring its mobility during flexion and extension of the knee joint. Damage to these ligaments can lead to knee instability.

**The posterior ligament of the head of the fibula (lat. ligamentum collaterale fibulae posterius) is one of the muscles of the posterior group of the ankle joint (lat. musculus peroneus lateralis posterius), which gives the joint additional stabilizing properties.

It is part of the dorsal ligament of the knee joint and connects to the tibia at its transition to the foot. Thanks to this arrangement, it allows the fibula to remain close to the Achilles tendon. Connects the back of the lateral malleolus and the calcaneus behind the lateral process of the tibial tuberosity. It is considered one of the weak parts of the ligamentous complex of the anterolateral capsule and a vulnerable point when walking up steps, both under load and without it, due to its displacement to the periphery of the joint: with a sharp contraction, together with the fibula, it moves back and inward with pronation. In the vast majority of cases, it gapes within the physiological norm. The anterior edge of the bursa of the posterior ligament of the head of the fibulae extends deep between the plantar and dorsal sides of the third sphenoid bone and the articular surfaces of the first and second sphenoid bones. The posterior edge of the posterior ligament lies behind the posterior aspect of the fifth cuneiform and tibiofibular articular surface.