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Consists of seven tarsal bones: talus, calcaneus, navicular bone, cuboid bone, and three cuneiformbones.
1. Talus
Transmits the weight of the body from the tibia to the foot and is the only tarsal bone without muscle attachments.
Has a neck with a deep groove, the sulcus tali , for the interosseous ligaments between the talus and the calcaneus.
Has a body with a groove on its posterior surface for the flexor hallucis longus tendon.
Has a head , which serves as keystone of the medial longitudinal arch of the foot.
2. Calcaneus
Is the largest and strongest bone of the foot and lies below the talus.
Forms the heel of the foot, articulates with the talus superiorly and the cuboid anteriorly, and provides an attachment for the Achilles tendon.
Has a shelf-like medial projection called the sustentaculum tali , which supports the head of the talus (with the spring ligament) and has a groove on its inferior surface for the flexor hallucis longus tendon (which uses the sustentaculum tali as a pulley).
3. Navicular bone
Is a boat-shaped tarsal bone lying between the head of the talus and the three cuneiform bones.
4. Cuboid bone
Is the most laterally placed tarsal bone and has a groove for the peroneus longus muscle tendon.
Serves as the keystone of the lateral longitudinal arch of the foot.
5. Cuneiform bones
Are three wedge-shaped bones that form a part of the medial longitudinal and proximal transverse arches.
Articulate with the navicular bone posteriorly and with three metatarsals anteriorly.
Metatarsus
Metatarsus
Consists of five metatarsals and has prominent medial and lateral sesamoid bones on the first metatarsal.
Phalanges
Phalanges
Consists of 14 bones (two in the first digit and three in each of the others).