Slideshow: Anterior Thigh
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The document describes the anatomy of the anterior thigh compartment. It is divided into 3 sections - anterior, medial, and posterior - by intermuscular septa. The major muscles of the anterior compartment are the sartorius and quadriceps femoris group (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis). Together they perform knee extension. Each muscle originates on the pelvis or femur and inserts via the patella and quadriceps tendon. They are innervated by branches of the femoral nerve.
Slideshow: Anterior Thigh
- 2. The thigh is the region between the hip and knee joints Hip Joint Knee Joint Thigh
- 3. The region below the knee joint is the leg Hip Joint Knee Joint Thigh Leg
- 4. The thigh is divided into 3 functional compartments
- 5. The thigh is divided into 3 functional compartments 1. Anterior or Extensor compartment 1. Medial or Adductor compartment 1. Posterior or Flexor compartment
- 6. The thigh is divided into 3 functional compartments The anterior and posterior compartments are separated by the medial and lateral intermuscular septa The adductor muscles do not have a fascial boundary, but are continuous with the posterior compartment
- 7. Skin Thigh compartments mediallateral posterior anterior Cross section through right mid-thigh looking towards hip joint
- 8. Septa SeptaSubcutaneous Fat Thigh compartments mediallateral posterior anterior Cross section through right mid-thigh looking towards hip joint
- 9. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid-thigh looking towards hip joint
- 10. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid-thigh looking towards hip joint medial intermuscular septum lateral intermuscular septum
- 11. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid-thigh looking towards hip joint Posterior / Flexor compartment Medial / Adductor compartment Anterior / Extensor compartment
- 12. Muscles of the Anterior Compartment of the Thigh Sartorius Quadriceps Femoris - Rectus Femoris - Vastus Lateralis - Vastus Intermedius - Vastus Medialis
- 13. Muscles of the Anterior Compartment of the Thigh Sartorius Quadriceps Femoris - Rectus Femoris - Vastus Lateralis - Vastus Intermedius - Vastus Medialis Adductor Longus and Pectineus are sometimes considered to be part of both the anterior and adductor compartments
- 14. Muscles of the Anterior Compartment of the Thigh Sartorius Quadriceps Femoris - Rectus Femoris - Vastus Lateralis - Vastus Intermedius - Vastus Medialis Adductor Longus and Pectineus will be discussed in the adductor compartment section
- 15. Sartorius Arises from Anterior Superior Iliac Spine Inserts onto Tibia (upper medial surface)
- 16. Sartorius Flexes, abducts and laterally rotates thigh at hip joint Flexes, medially rotates leg at knee joint
- 17. The medial border of Sartorius forms the lateral boundary of the Femoral Triangle Patella Sartorius Anterior Superior Iliac Spine Femoral Triangle
- 18. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid- thigh looking towards hip joint Posterior / Flexor compartment Medial / Adductor compartment sartorius
- 19. The predominant muscle of the Anterior Compartment is Quadriceps Femoris a powerful extensor of the knee joint
- 20. The anterior muscle of Quadriceps Rectus Femoris It is the only member of Quadriceps that attaches to the hip bone
- 21. Arises from two heads Straight head Anterior inferior iliac spine Reflected head just superior to the acetabulum Rectus Femoris
- 22. Inserts onto the Patella via the Quadriceps tendon Patella Rectus Femoris Rectus Femoris
- 23. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid- thigh looking towards hip joint Posterior / Flexor compartment Medial / Adductor compartment sartorius rectus femoris
- 24. Vastus Medialis Lies under Rectus Femoris
- 25. Arises from posterior Femur - Linea Aspera - Medial Supracondylar Ridge Posterior Femur Vastus Medialis It wraps itself around the medial aspect of the Femur
- 26. Linea Aspera Medial Supracondylar Ridge Vastus Medialis Patella Inserts onto the Patella via the Quadriceps tendon Posterior Femur Rectus Femoris Vastus Medialis
- 27. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid- thigh looking towards hip joint Posterior / Flexor compartment Medial / Adductor compartment sartorius rectus femoris vastus medialis
- 28. Arises from posterior Femur - Linea Apsera - Lateral Supracondylar Ridge Posterior Femur Vastus Lateralis It wraps itself around the lateral aspect of the Femoral shaft
- 29. Linea Aspera Lateral Supracondylar Ridge Vastus Lateralis Patella It inserts onto the lateral border of the Patella and blends with the Quadriceps tendon Posterior Femur Vastus Lateralis
- 30. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid- thigh looking towards hip joint Posterior / Flexor compartment Medial / Adductor compartment sartorius rectus femoris vastus medialis vastus lateralis
- 31. Vastus Intermedius Is very deeply placed Arises from anterior and lateral surfaces of Femur Its fibres end in a superficial aponeurosis which forms the deep part of the Quadriceps tendon
- 32. Femur Septa Septa Thigh compartments mediallateral posterior anterior Cross section through right mid- thigh looking towards hip joint Posterior / Flexor compartment Medial / Adductor compartment sartorius rectus femoris vastus medialis vastus lateralis vastus intermedius
- 33. Nerve Supply
- 34. Sartorius is innervated by the Femoral Nerve an important branch of the Lumbar Plexus Sartorius Lumbar Plexus Femoral Nerve
- 35. Each head of Quadriceps Femoris receives its nerve supply from a separate branch of the Femoral Nerve Femoral Nerve Quadriceps Femoris
- 36. Summary of muscles of anterior compartment of the thigh
- 37. Sartorius Origin Anterior superior iliac spine Insertion Superior aspect of the medial surface of the tibial shaft near the tibial tuberosity Action Flexes and laterally rotates the hip joint and flexes the knee Nerve Supply Femoral nerve (L2, L3, L4) Blood Supply Femoral artery Anterior Thigh
- 38. Anterior Thigh Rectus Femoris Origin Straight head from anterior inferior iliac spine; Reflected head from groove just above acetabulum Insertion Base of patella to form the more central portion of the quadriceps femoris tendon Action Extends the knee Nerve Supply femoral nerve (L2, L3, L4) Blood Supply Lateral circumflex femoral artery
- 39. Vastus Medialis Origin Inferior intertrochanteric line, spiral line, medial lip linea aspera, superior medial supracondylar ridge of femur, medial intermuscular septum Insertion Medial base and border of patella; medial patellar retinaculum, medial side of quadriceps femoris tendon Action Extends the knee Nerve Supply femoral nerve (L2, L3, L4) Blood Supply Femoral artery, profunda femoris artery, and superior medial genicular branch of popliteal artery Anterior Thigh
- 40. Vastus Lateralis Origin Superior intertrochanteric line, anterior and inferior borders of greater trochanter, superior portion of lateral lip of linea aspera, and lateral portion of gluteal tuberosity of femur Insertion Lateral base and border of patella lateral patellar retinaculum and lateral quadriceps femoris tendon Action Extends the knee Nerve Supply femoral nerve (L2, L3, L4) Blood Supply Lateral circumflex femoral artery Anterior Thigh
- 41. Anterior Thigh Vastus Intermedius Origin Superior 2/3 of anterior and lateral surfaces of femur; also from lateral intermuscular septum of thigh Insertion Lateral border of patella; also forms the deep portion of the quadriceps tendon Action Extends the knee Nerve Supply femoral nerve (L2, L3, L4) Blood Supply Lateral circumflex femoral artery