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Biol129_C12 - Lower Leg Compartments Three major A L P...

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1 Lower Leg Three major: A, L, P – Anterior – Foot/toe dorsiflexion – Lateral – Foot elevators – Posterior – Foot/toe plantarflexion Compartments
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2 Vessels Femoral A becomes the Popliteal A Around the knee there are 4 arteries: – Sup & Inf, Lat & Med Genicular A. Popliteal A. gives off Ant Tibial A. – Penetrates the Interosseous Membrane Then Post Tibial gives off Fibular A. Veins • Deep – Ant and Post Tibial V. Join to become Popliteal V • Superficial – Saphenous V runs medially Joins Femoral inferior to triangle – Small Saphenous V runs dorsally Joins Popliteal above knee
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3 Innervation Sciatic courses posteriorly Sup to Knee it splits into Tibial & Fibular Fibular N – Wraps laterally around fibula and splits – Superficial (l) & Deep Fibular nn Saphenous N (fr. Femoral N) – Wraps medially around tibia to medial maleollus Innervation - 2 • Posteriorly – Tibial N Courses along post aspect of Tibia to foot Gives off many local nerves Continues to foot medially Gives rise to Sural N (S) & Plantar nn Supplies skin on post & lat leg, lat foot • Anteriorly – Sup & Deep Fibular nn continue to foot Lateral and Medial respectively
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