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Understanding Lower Body Muscles

Dive into the anatomy of the lumbar vertebrae, femur, and major muscles like psoas, iliacus, gluteus maximus, adductor longus, gracilis, and more to learn about their functions in thigh and leg movement. Discover how the hamstrings and quadriceps work as antagonistic pairs for leg extension.

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Understanding Lower Body Muscles

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Presentation Transcript

  1. Muscle Review

  2. O: Lumbar Vert. I: Femur A: Flexes thigh Psoas Major

  3. O: Ilium I: Femur A: Flexes Thigh Iliacus

  4. O: Sacrum, Coccyx, and ilium I: Femur, Facia A: Extends thigh Gluteus Maximus

  5. O: Ilium I: Femur A: Abducts, rotates thigh medial Gluteus Medius

  6. O: Pubic Bone I: Posterior of Femur A: Adducts thigh Adductor Longus

  7. O: Ischium I: Femur A: Adducts thigh, rotates thigh laterally Adductor Magnus

  8. O: Pubis I: Tibia A: Adducts thigh, rotates lower limb medially Gracilis

  9. O: Ilium I: Tibia A: Flexes leg, abducts thigh, rotates thigh laterally (Gum on shoe) *Longest muscle Sartorius

  10. O: Ischium, femur I: Tibia, fibula A: Flexes leg, extends thigh *1 of 3 Hamstring Biceps femoris

  11. O: Ischium I: Tibia A: Flexes Leg, extends thigh *2 of 3 Hamstring Semitendinosus

  12. O: Ischium I: Tibia A: flexes leg, extends thigh *3 of 3 hamstring Semimembranosus*

  13. O: Ilium I: Patella leading to tibia A: Extends leg at knee *Antagonist of hamstrings Rectus Femoris * Quadriceps (¼)

  14. O: Posterior of Femur I: Patella leading to tibia A: Extends leg at knee Vastus Lateralis (2/4)

  15. O: Medial surface of Femur I: Patella leading to tibia A: Extends leg at knee Vastus Medialis (3/4)

  16. O: Anterior surface of the femur I: Patella leading to tibia A: Extends leg at knee Vastus Intermedius* (4/4)

  17. O: Lateral surface of tibia I: Tarsal bones (cuneiform) 1st metatarsal A: Dorsiflexion and inversion of foot Tibialis Anterior

  18. O: Femur I: Posterior surface of the Calcaneus A: Plantar flexion of foot, flex knee Gastrocnemius

  19. My wife and I working out.

  20. O: Fibula and Tibia I: Posterior surface of calcaneus A: Plantar flexion of foot Soleus

  21. O: Tibia and Fibula I: Tarsals and metatarsals A: Plantar flexion, * Extensor Digitorium Fibularis Longus

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