The Tibialis Posterior is the deepest of all the calf muscles. It helps to support the arch of the foot.
Origin : Interosseous membrane (between the tibia and fibula).
Posterior surfaces of the tibia and fibula, adjacent to the interosseous membrane.
Insertion : Navicular tuberosity.
2nd, 3rd, and 4th metatarsals.
Actions : Plantarflexion.
Innervation : Tibial nerve.
Daily uses : Pushing down car pedals.
Example strengthening exercises : Tibialis posterior exercise with band