Tibialis Posterior


The Tibialis Posterior is a small muscle situated in the lower leg which assist with ankle movement and foot stability

Anatomy and Function


Proximal posterolateral aspect of the tibia.

Proxmial posteromedial aspect of the fibula and the interosseous membrane. 

Mid portion

Situated in the deep posterior compartment of the lower leg and runs proximal to the medial malleoli where it is secured by the flexor retinaculum. 


The major insertion is onto the navicula and the plantar slip attatches to the medial cuniform 

Blood Supply  Posterior Tibial Artery

Tibial Nerve (L4-S3)

Function To plantarflex and invert the ankle. It also plays an important role in stabilising the medial longitudinal arch.



Pubmed Feed 


  1. Drake RL, Vogl W, Mitchell AWM. Gray's Anatomy for Students. 2nd Ed. Philadelphia: Churchill Livingstone Elsevier, 2010.
  2. T.A.A.I. Tibialis Posterior Muscle. Available from: https://www.youtube.com/watch?v=ZEHe5PAL_F0 [lasted accessed 01/10/15]