Dissection of anterior aspect of vertebral column

Sacral region.

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Image #221-6

Dissection of anterior aspect of vertebral column

Sacral region.

lumbosacral part of vertebral canal,opened and viewed from in front

1. Intervertebral disc L. III-IV (pointer on anulus fibrosus)
2. Anterior longitudinal ligament
3. Body of vertebra L. III (partly resected)
4. Anterior internal vertebral venous plexus
5. Intervertebral disc L. IV - V (pointer on nucleus pulposus)
6. Dura mater
7. Fibrous attachment of dura to posterior longitudinal ligament (cut off)
8. Sympathetic tnmk
9. Upper pointer: Sacrum (body resected) Lower pointer: Remnant of intervertebral disc S. I - II
10. Iliopsoas muscle
11. Lateral sacral arteries
12. Femoral nerve
13. Sacral plexus
14. External iliac artery
15. Obturator nerve
16. Coccygeus muscle (posterior border of pelvic diaphragm)
17. Piriform muscle
18. Internal vertebral venous plexus
19. Transverse process of vertebra L. IV
20. Ligamentum flavum
21. Pedicle (arch of vertebra) L. V (cut across)
22. Upper pointer: Spinal ganglion lumbar nerve V Lower pointer: Spinal branch iliolumbar artery
23. Lateral femoral cutaneus nerve
24. Obturator nerve
25. Femoral nerve
26. Lateral part sacrum
27. Lumbosacral trunk
28. Sacral nerve I (in pelvic sacral foramen)
29. Dural filum terminale (coccygeal nerves fused with this at lower level)
30. Sacral nerve II
31. Sacral canal (lined by periosteum)
32. Sacral nerve III
33. Sacral nerve IV
34. Sacral nerve V
35. Sympathetic trunk
36. Coccygeal nerve
37. Coccyx (covered by periosteum)