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Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of male pelvis from a lateral approach

Left lateral view of pelvis with pelvic diaphragm exposed

Image #168-7

KEYWORDS: Muscles and tendons.

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Dissection of male pelvis from a lateral approach
Left lateral view of pelvis with pelvic diaphragm exposed
The specimen utilized for the dissection of the perineum has been turned to expose its left side. The musculature of the hip has been resected and parts of the ischium and pubis have been removed. The obturator membrane and obturator internus muscle have been excised. The inferior fascia of the pelvic diaphragm (anal fascia) has been removed so that the levator ani muscle (30) is visible. A portion of the urogenital diaphragm (31) has been retained for purposes of orientation and the internal pudendal artery (28) remains approximately in its original position. The pudendal nerve (22) has been divided and that part of the nerve which extended from the ischial spine to the urogenital diaphragm has been removed.
  1. Tubercle of iliac crest
  2. Iliac crest
  3. Ala of ilium
  4. Anterior superior iliac spine
  5. Upper pointer: Reflected head origin of rectus femoris muscle Lower pointer: Acetabulum
  6. Origin of rectus femoris muscle
  7. Iliopsoas muscle (cut across)
  8. Femoral nerve (cut across)
  9. Iliopectineal arch
  10. Obturator nerve (cut off)
  11. Pectineus muscle (cut across)
  12. Upper pointer: Obturator fascia Lower pointer: Tendinous arch of levator ani muscle
  13. Body of pubic bone (partially removed)
  14. Suspensory ligament of the penis
  15. Crus of penis
  16. Posterior superior iliac spine
  17. Superior gluteal artery
  18. Sacrotuberous ligament
  19. Piriform muscle (cut across)
  20. Sciatic nerve
  21. Inferior gluteal artery
  22. Pudendal nerve (cut off)
  23. Ischial spine
  24. Coccygeus muscle
  25. Inferior rectal nerve
  26. Coccyx
  27. Anococcygeal ligament
  28. Internal pudendal artery
  29. External anal sphincter muscle
  30. Levator ani muscle
  31. Urogenital diaphragm
  32. Central tendon of perineum
  33. Bulb of penis
  34. Spongy part of urethra (opened)