9-22-09A handout

9-22-09A handout - Posterior Muscles of the Leg •...

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Unformatted text preview: Posterior Muscles of the Leg • Gastrocnemius • Plantaris • Soleus • Popliteus Gastrocnemius • Gastroc • Posterior in location; medial and lateral heads • O: - femur • I: tendocalcaneus (Achilles tendon) • NN: tibial nerve • A: knee flexion; ankle – plantar flexion • ** RA – knee – extension when weight bearing (closed chain) due to 2 joint capabilities • ** C – In the average adult there is a normal 15° of external tibial torsion or twisting (rotational movement), resulting in a larger and lower and stronger medial head of the gastroc Plantaris • posterior • Tendons going sideways • O: lateral linea aspera of femur (2 joints) • I: medial tendocalcaneus (Achilles tendon) • NN: tibial • A: knee flexion – weak o Ankle – plantar flexion - weak Soleus Posterior • O: tibia and fibula • I: tendo calcaneus (Achilles tendon) • NN: tibial nerve • A: - ankle plantar flexion; no knee action because origin is below the knee (1 joint) • C: forms the bulk of the anterior medial leg – most medial muscle...
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This note was uploaded on 02/11/2010 for the course AHS 234 taught by Professor Bial during the Fall '09 term at Nassau CC.

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9-22-09A handout - Posterior Muscles of the Leg •...

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