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Tibialis Posterior
Region: Leg & Foot Muscles · All leg & foot muscles
Tibialis Posterior at a glance
| Origin | Back surfaces of the tibia and fibula and the interosseous membrane |
|---|---|
| Insertion | Navicular tuberosity and the cuneiforms, cuboid and metatarsal bases (underside of the foot) |
| Actions | Points the foot downward (plantarflexion); Turns the sole inward (inversion); Supports the medial arch of the foot |
| Nerve supply | Tibial nerve (L4–L5) |
◆ Good to know
The chief dynamic supporter of the foot's medial arch; when its tendon fails in adults the arch collapses into an acquired flat foot.
More Leg & Foot Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.