Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 7. Lower Limb

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Atlas of Human Anatomy in Cross Section: Section 7. Lower Limb

Plate 7.2

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed

Upper Left Quadrant	Lower Left Quadrant	Lower Right Quadrant	Upper Right Quadrant
1. Vastus intermedius m. 2. Profunda femoris a. and v. 3. Vastus medialis m. 4. Medial intermuscular septum and saphenous nerve 5. Femoral a. and v. 6. Femoral nerve brs. 7. Sartorius m.	8. Anterior femoral cutaneous nerve 9. Great saphenous v. 10. Adductor magnus m. 11. Gracilis m. 12. Perforating a. and v. 13. Fascia lata 14. Semimembranosus m. 15. Sciatic nerve	16. Semitendinosus m. 17. Posterior femoral cutaneous nerve 18. Biceps femoris (long head) m. 19. Artifact 20. Lateral intermuscular septum 21. Biceps femoris (short head) m.	22. Vastus lateralis m. 23. Vastus intermedius m. 24. Linea aspera of femur 25. Femur 26. Rectus femoris m.

This section is three sections (3 cm) below the preceding first section in this series.

Note the origin of the adductor magnus (10), biceps (short head) (2 1), vastus lateralis (22), and the vastus medialis (3) from the linea aspera.

Femoral nerve branches (6) and the sciatic nerve (15) are identified. Of those muscles innervated by the obturator nerve, only the gracilis (11) and adductor magnus (10) remain in the plane of section.

The posterior (femoral) cutaneous nerve (of the thigh) (17) and saphenous (4) (cutaneous) nerve are identified. The deep femoral artery and vein (2), the great saphenous vein (9), and the femoral artery and vein (5) can be seen.

The hamstring muscles include semimembranosus (14), semitendinosus (16), long of biceps femoris (18), and the short head of biceps femoris (21). All are innervate the tibial part of the sciatic nerve except the short head of the biceps, which is innervated by the peroneal branch of the sciatic nerve.

The lateral (20) and medial (4) intermuscular septa separate the anterior extensor group of muscles from the posterior flexor and medial adductor groups of muscles. The medial and posterior muscle groups are closely related developmentally. Adductor magnus belongs ontogenetically to both of these groups.

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