Ankle and Foot

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Physical Education and Sport
Gail Amort- Larson

The Ankle and Foot 26 bones -tarsus(ankle) contains 7 tarsal bones ~ 1/6 of weight comes through fibula, rest is directed through fibula -Midline of foot is 2nd toe -Talus: 2nd largest bone in foot, easily palpated. Primary tibial articulation is between tibia and talus. (Medial malleolus of tibia, lateral malleolus of fibula, with smooth superior trochlea of talus and medial and lateral extensions off talus. Narrower at back. -Calcaneus: (heel bone) easily palpated largest tarsal bone, easily palpated. most of weight transferred from tibia to calcaneus to ground. Rough knob-shaped posteriorly(attachment for calcanean tendon) -Cuboid: easily palpated. articulates with anterior, lateral surface of calcaneus -Navicular: (means boat) easily palpated. medial side of ankle, articulates with anterior aspect of talus. Distal aspect of navicular articulates with three cuneiform bones -Cuneiform bones: three wedge-shaped bones in a row. Anterior to navicular. Medial cuneiform, intermediate cuneiform(narrower than other 2 inferiorly forming metatarsal arch), lateral cuneiform. Proximally articulate with navicular, lateral cuneiform articulates with medial surface of cuboid Metatarsal bones: form metatarsus(distal portion of foot) numbered 1-5 medially- >laterally. First 3 metatarsal bones articulate with cuneiform bones, last 2 articulate with cuboid. Phalanges: same organization as phalanges of fingers. Hallux has two phalanges Arches of the Foot -formed by bony arrangements, provide “give” while walking and standing -Medial arch formed by 1st metatarsal, 1st cuneiform, navicular, talus, calcaneus, ligaments -Lateral arch formed by calcaneus,lateral cuneiform, 5th metacarpal -Longitudinal arch: medial and lateral arches. Ligaments/tendons tie calcaneus to distal portions of metatarsal bones. Lateral side carries most of weight while standing normally. Elasticity helps absorb shock -Transverse arch: degree of curvature varies from lateral to medial borde
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