Exploration of gluteal region and hip

Obturator internus and quadratus femoris muscles, posterior view

Stanford holds the copyright to the David L. Bassett anatomical images and has assigned Creative Commons license Attribution-Share Alike 4.0 International to all of the images.
For additional information regarding use and permissions, please contact Dr. Drew Bourn at dbourn@stanford.edu.

Image #181-1

Exploration of gluteal region and hip

Obturator internus and quadratus femoris muscles, posterior view

The piriformis and the gluteal muscles have been cut away. The sciatic nerve has been cut off close to the greater sciatic foramen.

1. Origin of gluteus medius muscle
2. Piriform muscle
3. Sciatic nerve
4. Body of ischium
5. Greater trochanter
6. Quadratus femoris muscle
7. Obturator externus muscle
8. Gemelli muscles
9. Obturator internus muscle
10. Ischial tuberosity
11. External anal sphincter muscle
12. Anus
13. Posterior superior iliac spine
14. Sacral bone
15. Dorsal branch of S. II
16. Dorsal foramen S. III
17. Coccyx bone
18. Anococcygeal nerve
19. Levator ani muscle