Muscle Atlas

Tibialis Posterior

Origin: Posterior aspect of interosseous membrane, superior 2/3 of medial posterior surface of fibula, superior aspect of posterior surface of tibia, and from intermuscular septum between muscles of posterior compartment and deep transverse septum
Insertion: Splits into two slips after passing inferior to plantar calcaneonavicular ligament; superficial slip inserts on the tuberosity of the navicular bone and sometimes medial cuneiform; deeper slip divides again into slips inserting on plantar surfaces of metatarsals 2 - 4 and second cuneiform
Action: Principal invertor of foot; also adducts foot, plantar flexes ankle, and helps to supinate the foot
Innervation: Tibial nerve (L4, L5)
Arterial Supply: Muscular branches of sural, peroneal and posterior tibial arteries


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