Tibialis Posterior - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x 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 By TeachMeSeries Ltd (2026) Fig 1Muscles in the deep layer of the posterior leg. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Pro Feature - Dissection Atlas Prosection of the posterior leg with the proximal aspect of the gastrocnemius removed the demonstrate the underlying structures. Prosection of the posterior leg with the proximal aspect of the gastrocnemius removed the demonstrate the underlying structures. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the tibialis posterior muscle? The tibialis posterior is a muscle located in the deep compartment of the posterior leg, positioned between the flexor digitorum longus and flexor hallucis longus muscles. It plays a crucial role in foot movement and stability. What are the attachments of the tibialis posterior? The tibialis posterior originates from the posterior surface of the tibia and fibula, as well as the interosseous membrane. Its tendon passes behind the medial malleolus and attaches to the plantar surfaces of the medial tarsal bones. What actions does the tibialis posterior perform? The tibialis posterior is responsible for the inversion and plantarflexion of the foot. Additionally, it supports the medial arch, contributing to overall foot stability. What is the innervation of the tibialis posterior? The tibialis posterior is innervated by the tibial nerve, which is essential for its motor function. This nerve supplies the muscle, allowing it to perform its actions effectively. What is the blood supply to the tibialis posterior? The blood supply to the tibialis posterior muscle comes from the posterior tibial artery. This vascular supply is vital for maintaining the muscle's health and functionality. Rate This Article