Tibialis Posterior

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The Tibialis Posterior is located in the Deep Posterior Compartment of the (lower) leg. The muscles in the deep posterior compartment are:

• Popliteus
• Tibialis posterior
• Flexor digitorum longus
• Flexor hallucis longus

ATTACHMENTS:

• Posterior tibia and fibula to the navicular tuberosity.
  • The tibialis posterior also attaches distally onto metatarsals #2-4 and all the tarsal bones except for the talus.

ACTIONS:

• Plantarflexes the foot at the ankle joint.
• Inverts (Supinates) the foot at the subtalar joint.

NOTES:

1. The tibialis posterior is sometimes referred to as “Tom” of the “Tom, Dick, and Harry” group.
2. Inversion is the principal cardinal-plane (frontal-plane) component of the oblique-plane motion pattern of supination.