The foot is designed to provide strength, balance, stability, and flexibility. This is achieved by a complex series of 33 joints (26 bones) all of which articulate together to perform a complex array of movements.
The rear foot and ankle.
The rear foot and ankle consist of four bones:
- The tibia (large long bone of the shin)
- The fibula (smaller long bones of the session)
- The talus (ankle bone)
- The calcaneus (heel bone)
These 4 bones create two joints.
The talocrural joint is created by the articulation of the talus bone with the tibia and fibula bones of the shin and is responsible for dorsiflexion (flexing the ankle such as when stretching of calf) and plantarflexion (pointing your toes down such as when wearing high heels).
The talus and the calcaneus bones articulate to create the subtalar joint which is responsible for Inversion and eversion (turning your ankle inwards and outwards respectively).