Superficial Posterior Leg

Question 1

Gastrocnemius

Answer 1

Origin:
* Lateral head: lateral condyle & lateral supracondylar line of femur
* Medial head: medial condyle & popliteal surface of femur

Insertion: Posterior aspect of calcaneus via calcaneal tendon (Achilles)
Action: Ankle plantarflexion, knee flexion
Innervation: Tibial n.

Question 2

Soleus

Answer 2

Origin: Head & posterior surface of fibula, soleal line, medial border of tibia
Insertion: Posterior aspect of calcaneus via calcaneal tendon (Achilles)
Action: Ankle plantarflexion
Innervation: Tibial n.

Question 3

Plantaris

Answer 3

Origin: Lateral supracondylar line of femur
Insertion: Posterior aspect of calcaneus
Action: Assists in ankle plantarflexion & knee flexion
Innervation: Tibial n.