Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 6: Pelvis, Perineum, Hip, and Upper Thigh

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Atlas of Human Anatomy in Cross Section: Section 6. Pelvis, Perineum, Hip, and Upper Thigh

Plate 6.33

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. Mons pubis and labium majus 2. Skin, ventral surface 3. Adductor longus m. 4. Ligamentum teres (round ligament) of uterus 5. Adductor brevis m. 6. Sartorius m. 7. Rectus femoris m. 8. Obturator a., v., and nerve (posterior ramus) and gracilis m. 9. Iliopsoas m. (last appearance) 10. Adductor brevis m. 11. Vastus lateralis m. 12. Femur and adductor minimus m.	13. Tendon m. fascia lata 14. Adductor magnus m. 15. Tendon m. adductor magnus m. 16. Sciatic nerve 17. Gluteus maximus m. 18. Degenerate muscle tissue, semitendinosus m. 19. Adductor magnus (long head) m. 20. Dorsal skin 21. External anal sphincter m.	22. Anus 23. Panniculus adiposus 24. Ischiorectal fossa 25. Posterior (femoral) cutaneous nerve (of thigh) 26. Semitendinosus and biceps femoris mm. 27. Sciatic nerve 28. Tendon m. semimembranosus and adductor magnus m. 29. Adductor magnus m. and linea aspera 30. Femur, lesser trochanter 31. Femur	32. iliopsoas m. 33. Pectineus m. 34. Femoral nerve brs. 35. Femoral a. and v. 36. Ligamentum teres (round ligament) of uterus 37. Saphenous v. 38. Gracilis m. and pudendal plexus of vv. 39. Vestibule of vagina 40. Clitoris

This section passes through the clitoris (40), vagina (39), anus (22), the femora (12, 31), and the lesser trochanter of the femur (30).

The muscles of the upper thigh dominate the section. Of the anterior group of muscles, those seen at this level include the sartorius (6) and quadriceps femoris (7, 11). They are innervated by the femoral nerve (34).

The medial group of muscles is represented by gracilis (8, 38), pectineus (33), adductor brevis (5, 10), adductor longus (3), adductor minimus (a part of adductor magnus) (12), and adductor magnus (14, 15, 19, 28). These muscles are innervated by the obturator nerve (8) except pectineus, which gets its nerve supply from both the femoral and obturator nerves (34), and adductor magnus, which gets its nerve supply from the sciatic. Adductor minimus is supplied by the nerve to quadratus femoris (lumbosacral trunk and first sacral nerve).

The posterior group of muscles is represented by semimembranosus (28), semitendinosus (26), and biceps femoris (26). These muscles are innervated by the tibial division of the sciatic nerve (16, 27) except the short head of the biceps. The short head is not seen at this level, but it is innervated by the peroneal nerve.

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