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The talocrural joint is sometimes called the true ankle joint and is responsible for dorsiflexion and plantar flexion (up and down) movement of the foot. The joint between the tibia and talus bears the most of our body weight. Beneath the talocrural joint is the subtalar joint.uscles. The muscles that control ankle movement originate in the lower leg. They are responsible for foot and ankle movement up and down (dorsiflexion and plantar flexion) and turning in and out (inversion and eversion).
Movements and Muscles Involved. The ankle joint is a hinge type joint, with movement only possible in one plane. Thus, plantarflexion and dorsiflexion are the only movements that occur at the ankle joint. Eversion and inversion are produced at the other joints of the foot, such as the subtalar joint.rticulating Surfaces. The ankle joint is formed by three bones; the tibia and fibula of the leg, and the talus of the foot: 1  The tibia and fibula are bound together by strong tibiofibular ligaments, producing a bracket shaped socket, which is covered in hyaline cartilage. 2  This socket is known as a mortise.