Wrist, Hand and Foot - LO 5
5. Describe the main arches of the foot and the ligaments and tendons that support them.
Arches of the foot are important in distributing weight and absorbing shock that occurs in locomotion.
Medial longitudinal arch
Formed by tarsals (except cuboid) and 1st-3rd metatarsals
This is the higher of the two longitudinal arch
Head of talus is important component of this arch
Plantar calcaneonavicular (spring) ligament: supports head of talus
Sustentaculum tali of calcaneus to navicular
Long plantar ligament
Calcaneus to cuboid
Plantar calcaneocuboid (short) ligament
Between spring and long plantar ligaments
Leg muscle tendons also play an active role in supporting this arch
Clinical importance: the medial longitudinal arch is most affected in cases of flatfeet (‘fallen arches’)
Transverse arch of foot
Formed by cuboid, all cuneiforms, and bases of all metatarsals
Tendons of tibialis posterior and fibularis longus support this arch