Tibia & Fibula

Tibia and fibula are the leg bones that forms the part of a lower limb.

Tibia

Tibia

-It is the larger, medial, weight-bearing bone of the leg.

-The tibia articulates at its proximal end with the femur and fibula, and at its distal end with the fibula and the talus bone of the ankle.

-The tibia and fibula, are connected by an interosseous membrane.

-The proximal end is expanded into a lateral condyle and a medial condyle.

-These articulate with the condyles of the femur to form the lateral and medial tibiofemoral (knee) joints.

-The inferior surface of the lateral condyle articulates with the head of the fibula.

-The condyles are separated by a projection called the intercondylar eminence.

-The tibial tuberosity on the anterior surface is a point of attachment for the patellar ligament.

-Inferior to the tibial tuberosity is a sharp ridge is the anterior border.

– The medial surface of the distal end of the tibia forms the medial malleolus that articulates with the talus of the ankle.

-The fibular notch articulates with the distal end of the fibula to form the distal tibiofibular joint.

Fibula

Fibula

-It is located lateral and is smaller to the tibia.

-It does not articulate with the femur, but it stabilizes the ankle joint.

-The head of the fibula is the proximal end which articulates with the inferior surface of the lateral condyle of the tibia to form the proximal tibiofibular joint.

-The distal end has a projection called the lateral malleolus that articulates with the talus of the ankle, which can be seen as prominence in the lateral surface of the ankle.

-It articulates with the tibia at the fibular notch to form the distal tibiofibular joint.

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