Ankle Joint Anatomy

The ankle joint is composed of two bones from the lower leg (tibia and fibula) and one bone from the foot (talus) (figure 1 shown below). The stability of the ankle joint when standing is provided by the alignment of these bones [8]. These bones are held together by ligaments on either side. These ligaments provide further stability by resisting abnormal movements of the ankle joint—particularly when the foot is not firmly planted on the ground [9].