LUMBAR VERTEBRA-TRANSVERSE PROCESS (TP)

From NeuroRehab.wiki

SUMMARY

1. Formed from fused ribs (costal elements)
2. Posteriorly, each TP possesses 2 elevations with a groove between them: the mamillary process projecting back from the superior articular process; the accessory tubercle projecting from the root of the TP)
3. L1-4 TP appear spatulate and possess a vertical ridge on the anterior surface

ATTACHMENTS OF THE L1 TP
4. Superior/inferior borders: intertransverse ligaments & muscles
5. Anterior surface (medial to ridge): psoas
6. Anterior surface (lateral to ridge): quadratus lumborum
7. Posterior surface: erector spinae

8. Tip of TP: lumbar fascia
9. Medial & lateral arcuate ligaments
Typical-lumbar-vertebra-grays-illustration-5.jpeg

Image: Case courtesy of Craig Hacking, Radiopaedia.org. From the case rID: 82813


Reference(s)

R.M.H McMinn (1998). Last’s anatomy: regional and applied. Edinburgh: Churchill Livingstone. Get it on Amazon.
Drake, Richard L., et al. Gray's Anatomy for Students. Elsevier, 2023. Get it on Amazon.

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