The ankle, or the talocrural region, is the region where the foot and the leg meet. As a region, the anatomy and physiology mckinley pdf download is found at the junction of the leg and the foot. The talocrural joint is the only mortise and tenon joint in the human body,.
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The bony architecture of the ankle consists of three bones: the tibia, the fibula, and the talus. Because the motion of the subtalar joint provides a significant contribution to positioning the foot, some authors will describe it as the lower ankle joint, and call the talocrural joint the upper ankle joint. The mortise is a rectangular socket. The anterior and posterior talofibular ligaments support the lateral side of the joint from the lateral malleolus of the fibula to the dorsal and ventral ends of the talus.
The calcaneofibular ligament is attached at the lateral malleolus and to the lateral surface of the calcaneus. Though it does not span the ankle joint itself, the syndesmotic ligament makes an important contribution to the stability of the ankle. This ligament spans the syndesmosis, i. The bony architecture of the ankle joint is most stable in dorsiflexion. Thus, a sprained ankle is more likely to occur when the ankle is plantar-flexed, as ligamentous support is more important in this position.
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