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Updated: 1/3/2022

Tibialis posterior

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  • Summary
      • 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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