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 6.4

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. Peritoneal cavity 2. Ileum 3. Inferior epigastric a. and v. 4. Terminal ileum 5. Ascending colon 6. Ureter 7. Genital br., genitofemoral nerve, and testicular a. and v. 8. Femoral br., genitofemoral nerve 9. External abdominal oblique m. 10. Internal abdominal oblique m. 11. Transversus abdominis m. 12. Anterior superior spine of ilium 13. External and internal iliac aa. 14. Lateral (femoral) cutaneous nerve (of the thigh) Femoral nerve	16. Accessory obturator nerve 17. Obturator nerve and common iliac at junction with internal iliac vein 18. Iliolumbar v. 19. Fourth lumbar nerve 20. Gluteal fascia 21. Sacroiliac joint 22. Gluteus maximus m., tendinous origin 23. Sacrum 24. Posterior sacroiliac ligament 25. Anterior sacral foramen 26. Multifidus and iliocostalis lumborum mm. 27. Third sacral nerve 28. Intervertebral fibrocartilage and anterior longitudinal ligament	29. Second sacral nerve 30. Vertebra, L5 31. First sacral nerve 32. Median sacral and superior rectal aa. 33. Fourth lumbar nerve 34. Gluteus maximus m. 35. Femoral v. and obturator nerve 36. Gluteus medius m. 37. Anterior sacroiliac ligament 38. Accessory obturator nerve 39. Gluteus minimus m. 40. Femoral nerve 41. Iliacus m.	42. Psoas major m. and lateral (femoral) cutaneous nerve (of the thigh) 43. Os ilium 44. External and internal iliac aa. 45. Sigmoid colon 46. Genitofemoral nerve 47. External abdominal oblique m. 48. Internal abdominal oblique m. 49. Transversus abdominis m. 50. Ureter 51. Transversalis fascia 52. Semilunar line 53. Colon 54. Rectus abdominis m. 55. Rectus (abdominis) sheath 56. Median umbilical ligament

This section is through the sacral promontory and the inferior surface of the L5/S1 intervertebral disk (28). The sacroiliac joint (21) is seen. The anterior sacral foremen (25) is found at this level with the first sacral nerve (31). This cut is at the level of the sacral promontory (23), hence the following sections will be through the true pelvis.

The division of the left common iliac artery is completed and the external and internal

(13, 44) arteries are seen at this level.

The external oblique muscle (9, 47) appears for the last time.

The fourth lumbar (19) or furcal nerve appears at this level. The furcal nerve divide and contributes to both the lumbar and sacral plexuses of nerves.

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