muscles lower leg

muscles lower leg - Click to edit Master subtitle style...

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Unformatted text preview: Click to edit Master subtitle style Muscles of the Lower Leg Gastrocnemius • Origin: – medial head: medial femoral condyle – lateral head: lateral femoral condyle • Insertion: – posterior surface of calcaneus via Achilles tendon • Innervation: – tibial nerve (S1,2) Gastrocnemius-medial head Gastrocnemius-medial head Gastrocnemius-medial head Gastrocnemius-lateral head Gastrocnemius-lateral head Aponeurosis of Gastrocnemius Gastrocnemius Gastrocnemius • Actions: – Plantarflexion – Flexion of the knee Soleus • Origin: – posterior surface of head & upper shaft of fibula, soleal line of tibia • Insertion: – posterior calcaneus (via Achilles tendon) • Innervation: – tibial nerve (S1,2) Soleus Soleus Soleus Soleus Soleus Soleus • Action: – Plantarflexion Achilles Tendon Achilles Tendon Achilles Tendon Plantaris • Origin: – above lateral femoral condyle (above lateral head of gastrocnemius) • Insertion: – posterior calcaneus, medial to Achilles tendon • Innervation: – tibial nerve (S1,2) Plantaris Plantaris Plantaris Plantaris • Actions: – Plantarflexion – Flexion of the knee – Inversion Popliteus • Origin: – lateral condyle of femur and lateral meniscus • Insertion: – posterior surface of tibia above soleal line • Innervation: – tibial nerve (L4,5,S1) Popliteus Popliteus • Actions: – Initiates knee flexion – posterior rotary stabilizer of knee Tibialis Posterior...
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This note was uploaded on 11/03/2009 for the course KINE 306 taught by Professor Kiffin during the Spring '09 term at Texas A&M.

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