The ankle is the joint between the foot and leg. In humans, this joint is composed of three separate bones. The inner bone is the tibia, which supports most of a person's weight when standing. The outer bone is the fibula. The tibia and fibula are joined to the talus, which is one of the major tarsal bones and is located beneath the other two. This joint allows humans to walk, run, jump, and perform a range of other actions. It permits movement and contributes to lower limb stability. The joint allows for two distinct types of movement, called dorsiflexion and plantar flexion. Dorsiflexion involves the motion of the top part of the foot toward the leg. Plantar flexion is the opposite motion, in which the top of the foot moves away from the leg. The ankle is reinforced by a number of ligaments which connect the bones that make up the joint. These include the deltoid, anterior talofibular, calcaneofibular, and posterior talofibular ligaments.