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

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

Plate 6.20

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


Plate 6.20

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Common iliac a.
2. Right ureter
3. Common iliac v.
4. Anulus fibrosus, fifth lumbar intervertebral disk
5. Ascending colon
6. Psoas major m.
7. Femoral nerve
8. Iliacus m.

9. Fifth lumbar nerve
10. Ilium and sacroiliac joint
11. Gluteus medius m.
12. Gluteus maximus m.
13. Nucleus pulposus, fifth lumbar intervertebral disk
14. First sacral nerve
15. Multifidus m.
16. Nerve roots in theca

17. Supraspinous ligament
18. Ligamentum flavum
19. Dorsal thoracolumbar fascia
20. Multifidus m.
21. Iliocostalis and longissimus m.
22. Sacrum, first sacral vertebra
23. Interosseous sacroiliac ligament
24. Gluteus medius m.
25. Fifth lumbar nerve
26. Iliacus m.
27. Fourth lumbar nerve

28. Obturator nerve
29. Femoral nerve
30. Ilium and lateral (femoral) cutaneous nerve (of thigh)
31. Iliohypogastric and ilioinguinal nerves
32. Descending colon
33. Internal iliac v.
34. Psoas major m.
35. Ileum
36. Genitofemoral nerve
37. Ileum
38. Common iliac a.
39. Left ureter
40. Inferior vena cava at junction with left common iliac v.
41. Mesentery
42. Linea alba

This section passes through the linea alba (42), elements of the ileum (37), descending colon (32), ascending colon (5), the first sacral vertebra (22), the fifth lumbar intervertebral disk (4, 13), and the ilium (10, 30).

The inferior vena cave is seen at its junction with the left common iliac vein (40). The common iliac arteries are identified (1, 38).

Also seen are the genitofemoral (36), iliohypogastric and ilioinguinal (31), lateral (femoral) cutaneous (of thigh) (30), femoral (29), obturator (28), fourth (27) and fifth (9, 25) lumbar, and first sacral (14) nerves.

Important ligaments include interosseous sacroiliac (23), ligamentum flavum (18), and supraspinous (17).

The position of the ureters (2, 39) has not changed from that in the preceding section.

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