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Psoas Major
- O: Sides of T12-L5 and IV discs, TP of all lumbar vertebrea
- I: Lesser trochanter of femur
- N: AR L1,L2, L3
- A: Flexes hip
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Iliacus
- O: Superior 2/3rds of iliac fossa, ala of sacrum, and anterior sacroiliac ligaments
- I: Less trochanter of femur (joints psoas major) and shaft interior to it.
- N: Femoral n, (L2-4)
- A: Flexes hip
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Rectus Femoris
- O: AIIS and ilium superior to acetabulum
- I: Quadriceps tendon; patella, tibial tubercle via patellar ligament
- N: Femoral ( L2,L3,L4)
- A:Hip flexion, knee extension
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Vastus Lateralis
- O: Linea aspera (lateral lip), greater trochanter
- I: Quadriceps tendon; patella, tibial tubercle via patellar ligament
- N: Femoral (L2, L3, L4)
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Vastus Medialis
- O: Linea aspera (medial lip), intertrochanteric line
- I: Quadriceps tendon; Patella, tibial tubercle via patellar ligament
- N: Femoral (L2, L3, L4)
- A: Knee extension
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Vastus Intermedius
- O: Anterior and lateral femur
- I: Quadriceps tendon; Patella, tibial tubercle via patellar tendon
- N: Femoral (L2, L3, L4)
- A: Knee extension
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Tibials Anterior
- O: Lateral condule and superior lateral tibia, interosseous membrane
- I: Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal
- N: Ankle DFm and foot inversion
- A: Deep fibular (peroneal) (L4,L5)
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Extensor Hallucis Longus
- O: Middle surface of anterior fibular, interosseous membrane
- I: Distal phalanx of hallux
- N: Deep fibular (peroneal) (L5)
- A: MP and IP extension of hallus, ankle DF
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Gastrocnemius
- O: Medial head- popliteal surface of femur superior to medial condyle
- Later head- lateral femoral condyle
- I: Calcaneus via calcaneal tendon
- N: Tibial (S1,S2)
- A: Ankle PF, knee flexion
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Soleus
- O: Head and superior surface of posterior fibula, soleal line and medial border of tibia, tendinous arch btw bony attachments
- I: Calcaneus via calcaneal tendon
- N: Tibial (S1,S2)
- A: Ankle PF
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Fibularis (Peroneus) Longus
- O: Head and superior lateral surface of fibula
- I: Base of 1st metatarsal, medial cuneiform
- N: Superficial fibular (peroneal) (L5, S1,S2)
- A: Foot eversion, ankle PF
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Fibularis (Peroneus) Brevis
- O: Inferior lateral surface of fibula
- I: Tuberosity of base of 5th metatarsal
- N: Superifical fibular (peroneal) (L5,S1,S2)
- A: Foot eversion, ankle PF
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