Human Movement Science & Functional Anatomy of the:

Tibialis Posterior

by Dr. Brent Brookbush DPT, MS, PES, CES, CSCS, ACSM H/FS

Tibialis Posterior Note: In this illustration the gastroc and soleus have been removed. http://upload.wikimedia.org/wikipedia/commons/4/49/Tibialis_posterior.png

 

What's in a name:

  • Tibialis - Latin root tibia, literally translating to reed pipe, perhaps relating to the shape of the bone. Tibialis is the form of the root as an adjective - as in, related to the tibia - http://dictionary.reference.com/browse/tibia

  • Posterior - Latin, comparative of posterus, meaning coming after, derivative of post meaning after.

 

Tibialis Posterior - http://upload.wikimedia.org/wikipedia/commons/f/fa/Slide1ACA.JPG

 

Tibialis Posterior:

  • Origin: Most of the interosseous membrane, lateral portion of the posterior surface of the tibia, proximal 2/3 of the medial surface of the fibula, transverse intermuscular septa, fascia of adjacent muscles (flexor hallucis longus and flexor digitorum longus), and deep fascia. Although this muscle is considered a deep posterior compartment muscle, the fascia surrounding the tibialis posterior may give the impression of it having its own compartment during dissection (3, 8, 10, 11, 16).
  • Insertion: Tuberosity of the navicular bone and by fibrous expansions to the sustentaculum tali of the calcaneus, three cuneiforms, cuboid, and the bases of the second through fourth metatarsal bones (3, 11, 16, 17)).

    • Note: The tibialis posterior inserts onto every tarsal bone and metatarsal bone except the first metatarsal via its extensive ligamentous attachments (17).

  • Nerve: Tibial nerve arising from the