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SACRUM-PELVIC SURFACE OSTEOLOGY

Anatomy-Spine

SACRUM-PELVIC SURFACE OSTEOLOGY

1. Concave surface, smooth.

2. 4 transverse ridges persist to mark the lines of ossification. These represent the intervertebral discs.

3. On each side, the 4 anterior sacral foramina become smaller from above down, the rounded bars of bone b/w them represent fused head + neck of ribs.

4. The medial boundaries of the anterior sacral foramina are formed by the vertebral bodies.

5. The ala of the sacrum projects laterally from the upper surface of S1 vertebra, its margin forms the pelvic brim.

6. The mass of bone lateral to the foramina, the lateral mass, is formed by the fusion of the costal elements. It is indented by grooves for the anterior rami of S1-4.


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REFERENCES

1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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