TIBIALIS POSTERIOR

• Origin

Interosseous membrane, posterior surface of tibia and fibula

• Insertion

Navicular, cuneiforms, cuboid, and bases of 2nd, 3rd, and 4th metatarsals

• Agonist(s)

- Gastrocnemius

- Soleus

- Flexor digitorum longus

- Flexor hallucis longus

• Antagonist(s)

- Fibularis longus

- Fibularis brevis

• Function

Ankle inversion, ankle plantar flexion, ankle adduction, supports the arch of the foot