The tibialis posterior is a muscle within the deep compartment of the posterior leg. Is it located between the flexor digitorum longus and flexor hallucis longus muscles.
- Attachments: Originates from the posterior surface and interosseous membrane of the tibia and fibula. The tendon enters the foot posterior to the medial malleolus and attaches to the plantar surfaces of the medial tarsal bones.
- Actions: Inversion and plantarflexion of the foot. It also contributes to the medial arch of the foot.
- Innervation: Tibial nerve
- Blood supply: Posterior tibial artery