Posterior surface of tibia

The back or the posterior surface of tibia is situated between the medial and lateral (or interosseous) borders of the tibial shaft. The upper portion of the posterior surface is broader and is diagonally traversed downward and medially by a ridge of bone known as the soleal line. Above the soleal line, the triangular region of the posterior surface serves as the point of origin for the popliteus muscle. The soleal line gives rise to the soleus muscle and the fascial coverings of the soleus and popliteus muscles. Below the soleal line, the posterior surface is divided into medial and lateral halves by a vertical bony ridge. The medial half gives rise to the flexor digitorum longus muscle, while the lateral half provides origin for the tibialis posterior muscle. The rest of the posterior surface of tibia is smooth and overlaid by the Tibialis posterior, Flexor digitorum longus, and Flexor hallucis longus muscles. Later on, their tendons traverse through the tarsal tunnel to reach the sole of the foot.