| 1
.
| Erector spinae muscle (cut across) |
| 2
.
| Supraspinous ligament |
| 3
.
| Intertransverse ligament |
| 4
.
| Quadratus lumborum muscle (covered by middle layer of thoracolumbar fascia) |
| 5
.
| Left kidney (faintly visible through thoracolumbar and renal fascia) |
| 6
.
| Transverse process vertebrae L. IV |
| 7
.
| Latissimus dorsi muscle (cut edge) |
| 8
.
| Iliolumbar ligament |
| 9
.
| Iliac crest |
| 10
.
| Area of origin of gluteus medius muscle |
| 11
.
| Gluteus minimus muscle |
| 12
.
| Piriform muscle (cut across) |
| 13
.
| Sciatic nerve (emerging through greater sciatic foramen) |
| 14
.
| Upper pointer: Internal pudendal artery Lower pointer: Pudendal nerve |
| 15
.
| Obturator internus muscle (tendon of insertion) |
| 16
.
| Greater trochanter |
| 17
.
| Thoracolumbar fascia (posterior layer, reflected) |
| 18
.
| Intervertebral joint capsule L. IV-V |
| 19
.
| Middle sacral crest |
| 20
.
| Posterior superior iliac spine |
| 21
.
| Gluteus medius muscle |
| 22
.
| Dorsal sacroiliac ligament |
| 23
.
| Piriform muscle |
| 24
.
| Sacrotuberous ligament |
| 25
.
| Ischiorectal fossa |
| 26
.
| Superficial dorsal sacrococcygeal ligament |
| 27
.
| Coccyx |
