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vastus medialis

vastus medialis. ORIGIN- intertronchanteric line of femur; medial aspect of linea aspera INSERTION- common quadriceps tendon into patella, tibial tuberosity via patellar ligament ACTION- extends the calf at the knee

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vastus medialis

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  1. vastus medialis • ORIGIN- intertronchanteric line of femur; medial aspect of linea aspera • INSERTION- common quadriceps tendon into patella, tibial tuberosity via patellar ligament • ACTION- extends the calf at the knee • BLOOD- muscular branches of profunda femoris artery; saphenous branch of descending genicular artery • NERVE- femoral nerve, (L2), L3, 4

  2. vastus medialis

  3. iliacus • ORIGIN- inner surface of upper iliac fossa; anterior inferior iliac spine; anterior capsule of hip joint • INSERTION- iliopsas tendon to the lesser trochanter of the femur; medial aspect of the linea aspera • ACTION- powerfully flexes the thigh at the hip; external rotation of the femur • BLOOD- iliolumbar artery; deep circumflex iliac artery • NERVE- femoral nerve, L2, 3, 4

  4. iliacus

  5. psoas major • ORIGIN- vertebral bodies of T12-L4 and the intervening intervertebral discs; transverse processes of L1-L4 • INSERTION- iliopsoas tendon to the lesser trochanter of the femur; medial aspect of the lineaaspera • ACTION- flexes the thigh at the hip; external rotation of the femur • BLOOD- iliolumbar artery; lumbar artery; subcostal artery • NERVE- ventral rami, L1, 2, 3, 4

  6. psoas major

  7. pectineus • ORIGIN- pictineal line of the pubis; superior pubic ramus • INSERTION- the pectineal line of the femur • ACTION- flexes the thigh at the hip; adducts thigh at the hip; medially rotates thigh at the hip • BLOOD- muscular branches of medial femoral circumflex artery • NERVE- A: femoral nerve, L3, 4 or B: obturator nerve, L2, 3, 4 or A&B: femoral L3, 4 and accessory obturator L3, 4

  8. pectineus

  9. gastrocnemius • ORIGIN- medial head: just above medial condyle of femur; lateral head: just above lateral condyle of femur • INSERTION- calcaneus via lateral portion of calcaneal tendon • ACTION- plantarflexes the foot at the ankle; flexes the calf at the knee; stablilizes ankle and knee when standing • BLOOD- sural branches of popliteal artery; muscular branches of peroneal artery; posterior tibial artery • NERVE- tibial nerve, S1, 2

  10. gastrocnemius

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