tibialis posterior muscle


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to tibialis posterior muscle: Extensor digitorum longus muscle, Flexor digitorum longus muscle, Adductor magnus muscle, Tibialis anterior muscle

tib·i·al·is pos·ter·i·or mu·scle

(tib-ē-ā'lis pos-tēr'ē-ŏr mŭs'ĕl)
Most anterior (deepest) muscle of deep posterior (plantar flexor) compartment of leg; origin, soleal line and posterior surface of tibia, the head and shaft of the fibula between the medial crest and interosseous border, and the posterior surface of interosseous membrane; insertion, navicular, three cuneiform, cuboid, and second, third, and fourth metatarsal bones; action, plantar flexion and inversion of foot; nerve supply, tibial.
Synonym(s): musculus tibialis posterior [TA] .

tibialis posterior muscle

Leg muscle. Origin: anterior tibia and fibula. Insertion: navicular, cuneiform, and cuboid bones; metatarsals 2-4. Nerve: tibial (L4-L5). Action: inverts and plantarflexes foot.
See also: muscle

tibialis posterior muscle

; PTM lower-leg posterior-compartment muscle (see compromise of tibialis posterior PTM (function)
  • origin lower one-third of tibia, fibula and interposed interosseous

  • insertion primarily into navicular tuberosity, with distal slips passing to deep plantar structures (plantar aspects of cuneiforms, and 2, 3 and 4 metatarsal bases)

  • nerve supply tibial nerve

  • action ankle joint plantar flexion and subtalar joint inversion, locking talonavicular and calcaneocuboid joints; major dynamic hindfoot stabilizer, resisting valgus (pronatory) deformity