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Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of muscles of male perineum and pelvic diaphragm

Pelvic diaphragm viewed from above

Image #174-7

KEYWORDS: Muscles and tendons.

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Dissection of muscles of male perineum and pelvic diaphragm
Pelvic diaphragm viewed from above
The specimen shown in the previous view has been turned so that the pelvic diaphragm is seen from above and in front. The obturator fascia (14) has been preserved above the diaphragm on both sides and the superior fascia of the pelvic diaphragm (24) has been retained on the left side.
  1. Body of vertebra L. IV (pointer also indicates anterior longitudinal ligament)
  2. Transverse process vertebra L. IV
  3. Iliolumbar ligament
  4. Iliac crest
  5. Ventral sacroiliac ligament (lower pointer also indicates position of sacroiliac joint)
  6. Ala of ilium
  7. Lumbosacral trunk
  8. Coccygeus muscle
  9. Iliococcygeus muscle
  10. Pubococcygeus muscle
  11. Puborectalis muscle (9-11 make up the levator ani muscle)
  12. Tendinous arch of levator ani muscle
  13. Joint capsule of coccyx
  14. Obturator fascia (obturator internus muscle visible through fascia)
  15. Rectum (cut across at perineal flexure)
  16. Prostate
  17. Puboprostatic muscle
  18. Urethra
  19. Lateral part of sacrum
  20. Nutritive foramen
  21. Piriform muscle (cut off)
  22. Upper pointer: Intervertebral disc L. V - S. I Lower pointer: Coccyx
  23. Greater sciatic foramen
  24. Superior fascia of pelvic diaphragm (Levator ani muscle visible beneath fascia)
  25. Upper pointer: Linea terminalis Lower pointer: Line of attachment of fascia of psoas major muscle
  26. Upper pointer: Obturator fascia Lower pointer: Obturator canal
  27. Inguinal ligament
  28. Pectineal ligament
  29. Lacunar ligament
  30. Body of pubic bone
  31. Pubic symphysis