The Anatomy of the Ankle
Involves Two Joints
A broken ankle can involve one or more bones, as well as injury to the surrounding connecting tissues (ligaments).
Anatomy of the Ankle
The top ankle joint is composed of three bones:
- the shin bone (tibia)
- the other bone of the lower leg (fibula)
- the ankle bone (talus)
The leg bones form a scooped pocket around the top of the ankle bone. This lets the foot bend up and down.
Right below the ankle joint is another joint (subtalar), where the ankle bone connects to the heel bone (calcaneus). This joint enables the foot to rock from side to side. Three sets of fibrous tissue connect the bones and provide stability to both joints.
The knobby bumps you can feel on either side of your ankle are the very ends of the lower leg bones. The bump on the outside of the ankle (lateral malleolus) is part of the fibula; the smaller bump on the inside of the ankle (medial malleolus) is part of the shin bone.
Source: aofas
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