Tibialis posterior muscle
| Tibialis posterior muscle (caudalis) |
|---|
|
| origin |
| Membrana interossea, posterior surface between the tibia and fibula |
| approach |
| Tuberositas ossis navicularis , Os cuneiforme (in dogs and cats medially on the ankle or metatarsus; in other domestic animals via a deep flexor tendon on the terminal phalanx of the supporting toes) |
| function |
| Lower the foot ( plantar flexion ) and turn it inward ( supination ) |
| Innervation |
| Tibial nerve |
| Spinal segments |
| L4, L5, S1 |
The tibialis posterior muscle ( Latin for "posterior shin muscle ") is a skeletal muscle and is one of the deep flexors on the lower leg . The attachment tendon pulls through the tarsal tunnel and attaches to the scaphoid and sphenoid bone . Occasionally a sesamoid bone appears in it, called the Os tibiale externum, type 1 .
In veterinary anatomy, the muscle is referred to as the tibialis caudalis muscle and, together with the flexor digitorum lateralis muscle and the flexor digitorum medialis muscle, belong to the deep toe flexor. Except for the predators , its tendon unites with that of the other two heads to form the deep flexor tendon , which divides into several legs according to the number of supporting toes and attaches to their end phalanx.
function
The tibialis posterior muscle moves the foot towards the sole ( plantar flexion ) and lifts the inner edge of the foot ( supination ).
In animals, the muscle acts as a toe flexor and ankle extensor, in predators only as the latter.
Diseases
The tibialis posterior dysfunction is a degenerative disease of the insertion tendon of the tibialis posterior muscle.
The tibialis posterior muscle plays a crucial role in the pathogenesis of congenital clubfoot .