PLATE VII 



DIAGRAM OF THE LUMBO-SACRAL NERVE PLEXUS 



1-6. Lumbar vertebrae. 



1-5'. Sacral vertebrae. 



I "-6" Coccygeal vertebrae. 



I-VI. Ventral branches of lumbar nerves. 



I'-V. Ventral branches of sacral nerves. 



I"-V"- Ventral branches of coccygeal nerves. 



7. Gangliated nerve-trunk of the sympathetic nerve. 



8. Ramus communicans. 



9. N. iHo-hypogastricus. 



10. N. ilio-inguinalis. 



11. N. spermaticus externus. 



12. N. cutaneous femoris lateralis. 



13. Branch to M. psoas parvus. 



14. N. femoraUs. 



15. Branch to M. iliacus. 



16. N. obturatorius. 

 17-20. Nn. glutei anterior. 



21. N. ischiadicus. 



22. Posterior ventral gluteal nerve. 



23. Posterior dorsal gluteal nerve. 



24. N. pudendus. 



25. Small nerves to the pelvic plexus. 



26. Nerve to the M. retractor ani. 



27. N. haemorrhoidalis. 



28. 29. Fourth and fifth sacra] nerves. 



30. First coccygeal nerve. 



31. Nerve trunk formed by branches of the coccygeal nerves. 

 32-36. Coccygeal nerves. 



