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Review of the Knee Joint

Review of the Knee Joint. Name the ligament. Name the muscle and its action(s). Semitendinosus. Action: Flexion of the knee Internal rotation of the knee. 1. Vastus Medialis Rectus Femoris Vastus Lateralis. 2. 3. Tibia & Fibula. ? = ? = ? =. Medial condyle Lateral condyle

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Review of the Knee Joint

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  1. Review of the Knee Joint

  2. Name the ligament

  3. Name the muscle and its action(s) Semitendinosus • Action: • Flexion of the knee • Internal rotation of the knee

  4. 1. • Vastus Medialis • Rectus Femoris • Vastus Lateralis 2. 3.

  5. Tibia & Fibula ? =? = ? = Medial condyle Lateral condyle Head of fibula

  6. Name the muscle and its action Sartorius Action: Flexion at the knee

  7. Name the muscle and its action(s) Semimembranosus • Action: • Flexion of the knee • Internal rotation of the knee

  8. Anterior cruciate ligament • Lateral collateral ligament • Lateral meniscus • Posterior cruciate ligament • Medial collateral ligament • Medial meniscus 1. 2. 3. 4. 5. 6.

  9. Name the muscle and its action • Action: • Flexion of knee • Internal rotation of the knee Popliteus

  10. 1 = Lateral Meniscus 2 = Patella 3 = Medial meniscus 1. 3. 2.

  11. Name the colored muscles • Vastus medialis • Rectus femoris • Vastus lateralis 2 3 1

  12. ? = ? = ? = Lateral condyle Medial condyle Intercondylar fossa Femur

  13. Name the muscle and its action Gracilis Action - flexion at the knee

  14. 2. 3. 1. • = Vastus lateralis • = Rectus femoris • = Vastus medialis

  15. What is the Q angle? • The angle between the line of pull of the rectus femoris and the patellar ligament.

  16. Review • Define “screw home” movement. • Locking of the knee during full extension and external rotation. • Which type of rotation occurs during “unlocking” of the knee? • Internal rotation and flexion

  17. 1. 2. 3. 3. 4. 1. = Anterior cruciate ligament 2. = Lateral collateral 3. = Lateral meniscus 3. = Medial collateral 4. = Medial mieniscus

  18. Name the muscles. 1. 2. 3. 1 = Vastus lateralis 2 = Vastus intermedius 3 = Vastus medialis

  19. ? = ? = Fibula Head Lateral malleolus

  20. Name the muscles • Semitendonosis • Biceps femoris • Semimembranosis 1. 3. 2.

  21. Name the muscle and its action Biceps femoris • Action: • Flexion of knee • External rotation of the knee

  22. Medial condyle Lateral condyle Tibial tuberosicty ? =?= ? = Tibia

  23. Name two functions of the menisci. • Stabilization • Shock absorption • Lubrication

  24. Name the muscle and its action(s) Sartorius • Action: Flexion at the knee

  25. Questions • What is a uniarticulate muscle? • A muscle that crosses one joint • What is a biarticulate muscle? • A muscle that crosses two joints. • What is a disadvantage of a biarticulate muscle? • They are weaker during movement at both of the joints.

  26. 1. 2. 1 = Lateral meniscus 2 = Medial meniscus

  27. Femur • Medial condyle • Lateral condyle • Intercondylar fossa

  28. Name the muscle and its action(s) Popliteus • Action: • Flexion of the knee • Internal rotation of the knee

  29. Tibia 1. 2. • Lateral condyle • Medial condyle

  30. Name the muscle and its action Biceps femoris • Action: • Flexion of knee • External rotation of the knee

  31. Fibula Head Head Proximal Distal

  32. Name the muscles and its action • Action: • Extension of the knee 1. 2. 3. • Vastus lateralis • Vastus intermedius • Vastus medialis

  33. ACL Lat. Collat. Lat. Men. PCL Med. Collat. Med. Men. LIGAMENTS 4. 1. 5. 2. 3. 6.

  34. ACL Lateral men. PCL Medial men. Meniscus 1 4 2 3

  35. Name the muscle and its action • Action: • Extension of knee Rectus femoris

  36. QUESTIONS?

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