The fibula is the long, thin and lateral bone of the lower leg. It runs parallel to the tibia, or shin bone, and plays a significant role in stabilizing the ankle and supporting the muscles of the lower leg. Compared to the tibia, the fibula is about the same length, but is considerably thinner. The difference in thickness corresponds to the varying roles of the two bones; the tibia bears the bodyââ¬â¢s weight from the knees to the ankles, while the fibula merely functions as a support for the tibia. The bones of the ankle and foot form the most distal region of the lower limb in the appendicular skeleton. These bones are responsible for the propulsion, balance, and support of the bodyââ¬â¢s weight through many diverse activities, such as standing, walking, running, and jumping.
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