About This File
The bones of the leg and foot form part of the appendicular skeleton that supports the many muscles of the lower limbs. These muscles work together to produce movements such as standing, walking, running, and jumping. At the same time, the bones and joints of the leg and foot must be strong enough to support the body’s weight while remaining flexible enough for movement and balance.
The tibia and fibulaare the bones that support the leg. The larger tibia or shinebone is located medial to the fibula and bears most of the weight.
At the superior (proximal) end of the tibia, a pair of flattened condyles articulate with the rounded condyles at the distal end of the femur to form the knee joint joint.
The tibia and fibula articulate at two sites. At the knee, a superior (proximal) tibiofibular joint is formed by the lateral tibial condyle and head of the fibula. At the ankle, an inferior (distal) tibiofibular joint is formed by the lower fibula and a lateral concavity (notch) on the lower tibia.
The feet are flexible structures of bones, joints, muscles, and soft tissues that let us stand upright and perform activities like walking, running, and jumping. The feet are divided into three sections:
-The forefoot contains the five toes (phalanges) and the five longer bones (metatarsals).
-The midfoot is a pyramid-like collection of bones that form the arches of the feet. These include the three cuneiform bones, the cuboid bone, and the navicular bone.
-The hindfoot forms the heel and ankle. The talus bone supports the leg bones (tibia and fibula), forming the ankle. The calcaneus (heel bone) is the largest bone in the foot.