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image: Tibialis Posterior
Tibialis Posterior

Tibialis Posterior

 Articulations :

 Action :

  • Principal invertor of foot; also adducts foot, plantar flexes ankle and helps to supinate the foot.

Origin :

  • Posterior aspect of interosseous membrane,
  • superior 2/3 of medial posterior surface of fibula,
  • superior aspect of posterior surface of tibia
  • and from intermuscular septum between muscles of posterior compartment and deep transverse septum

Insertion :

  • Splits into two slips after passing inferior to plantar calcaneonavicular ligament.
  • superficial slip inserts on the tuberosity of the navicular bone and sometimes medial cuneiform
  • deeper slip divides again into slips inserting on plantar sufraces of metatarsals 2 − 4 and second cuneiform

Innervation :

  • Tibial nerve (L4, L5)

Arterial Supply :

  • Muscular branches of sural, peroneal and posterior tibial arteries.

Depth :

  • Superficial
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