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Sunday September 7, 2008
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Muscles of the Lower Extremity / Gastrocnemius
Page: 1
| Origin |
Medial head from posterior nonarticular surface of medial femoral condyle; Lateral head from lateral surface of femoral lateral condyle |
| Insertion |
The two heads unite into a broad aponeurosis which eventually unites with the deep tendon of the soleus to form the Achilles tendon, inserting on the middle 1/3 of the posterior calcaneal surface |
| Action |
Powerful plantar flexor of ankle |
| Innervation |
Tibial nerve (S1, S2) |
Arterial
Supply |
Each head supplied by a sural branch of the popliteal artery |
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