Posterior Leg Flashcards
What are the Superficial muscles of the Posterior Leg?
Gastrocnemius, Soleus, plantaris
What is the origin, insertion, innervation, and action of the Gastrocnemius?
Origin: lateral head- lateral aspect of lateral condyle of femur
medial head- popliteal surface of femur
Insertion: posterior surface of calcaneus via calcaneal tendon
Innervation: tibial nerve
action: plantar flexes ankle when knee is extended, raises heel when knee is flexed
What is the origin, insertion, innervation, and action of the Soleus?
Origin: posterior aspect of fibula, superior quarter of posterior surface of fibula
Insertion: posterior surface of calcaneus via calcaneal tendon
Innervation: tibial nerve
action: plantarflexes ankle, steadies leg on foot
What is the origin, insertion, innervation, and action of the Plantaris?
Origin: inferior end of lateral supracondylar
Insertion: posterior surface of calcaneus via calcaneal tendon
Innervation: tibial nerve
action: weakly assists gastrocnemius
What is the origin, insertion, innervation, and action of the Gastrocnemius?
Origin:
Insertion:
Innervation:
action:
What are the deep muscles of the Posterior Leg ?
Popliteus, Flexor Hallucis Longus, Flexor Digitorum Longus, Tibialis Posterior
What is the origin, insertion, innervation, and action of the Popliteus?
Origin:lateral surface of lateral condyle of femur and lateral meniscus
insertion: Posterior surface of tibia , superior to soleal line
innervation: Tibial Nerve
action: weakly flexes knee, unlocks it by laterally rotating femur on fixed tibia
What is the origin, insertion, innervation, and action of the flexor hallucis longus?
Origin: inferior two thirds of posterior surface of fibula
insertion: base of distal phalanx of great toe
innervation: Tibial Nerve
action: flexes great toe at all joints, weakly plantar flexes ankle, supports arch
What is the origin, insertion, innervation, and action of the Flexor digitorum longus ?
Origin: medial part of posterior surface of tibia inferior to soleal line
insertion: bases of distal phalanges of lateral four digits
innervation: Tibial Nerve
action:flexes lateral four digits, plantar flexes ankle, supports arch
What is the origin, insertion, innervation, and action of the Tibialis posterior?
Origin:interossesus membrane, posterior surface of tibia inferior to soleal line.
insertion: primarily to tuberosity of navicular also to cuneifroms
innervation: Tibial Nerve
action: plantarflexes ankle, inverts foot, supports arch
What structures run behind the medial malleolus?
Tibialis posterior tendon, flexor digitorum longus tendon, posterior tibial artery, posterior tibial vein, tibial nerve, flexor hallucis longus tendon
Tom Dick And A Very Nervous Harry
What Covers Tom Dick And Harry? What does it form?
Flexor retinaculum and forms the tarsal tunnel
What can get compressed in the tarsal tunnel?
Tibial nerve
How do we Invert the foot?
we use one foot from anterior compartment and one from deep posterior compartment ( This rule does not apply for eversion)
What two muscles invert the foot?
tibialis anterior and tibialis posterior
