Deep Group Of Muscles In The Posterior Compartement Of The Lower Leg Flashcards
What are the 4 muscles in the deep posterior lower leg?
- Popliteus
- Flexor Hallucis Longus
- Flexor Digitorum Longus
- Tibialis Posterior
What is the origin of the Popliteus?
Lateral femoral condyle
What is the insertion of the Popliteus?
Posterior surface of proximal tibia
What is the innervation of the Popliteus?
Tibial Nerve ( L4 to S1 )
What is the function of the Popliteus?
Stabilizes knee joint (resists lateral rotation of tibia on femur). Unlocks knee joint (laterally rotates femur on fixed tibia)
What is the origin of the Flexor Hallucis Longus?
Posterior surface of fibula and adjacent interosseous membrane
What is the insertion of the Flexor Hallucis Longus?
Plantar surface of distal phalanx of great toe
What is the innervation of the Flexor Hallucis Longus?
Tibial Nerve ( S2,S3 )
What is the function of the Flexor Hallucis Longus?
Flexes great toe
What is the origin of the Flexor Digitorum Longus?
Medial side of posterior surface of the tibia
What is the insertion of the Flexor Digitorum Longus?
Plantar surfaces of bases of distal phalanges of the lateral four toes
What is the innervation of the Flexor Digitorum Longus?
Tibial Nerve ( S2,S3 )
What is the function of the Flexor Digitorum Longus?
Flexes lateral four toes
What is the origin of the tibialis posterior?
Posterior surfaces of interosseous membrane and adjacent regions of tibia and fibula
What is the insertion of the tibialis posterior?
Mainly to tuberosity of navicular and adjacent regions of medial cuneiform
What is the innervation of the tibialis posterior?
Tibial Nerve ( L4,L5 )
What is the function of the tibialis posterior?
Inversion and plantarflexion of foot; support of medial arch of foot during walking
