| 1
.
| Dorsal branch coccygeal nerve |
| 2
.
| Dorsal branch sacral nerve V |
| 3
.
| Connecting ioop between fifth sacral nerve and coccygeal nerve |
| 4
.
| Piriform muscle (transected) |
| 5
.
| Sciatic nerve |
| 6
.
| Lateral border of sacrum |
| 7
.
| Inferior gluteal artery |
| 8
.
| Internal pudendal vein (cut off) |
| 9
.
| Upper pointer: Pudendal nerve Lower pointer: Internal pudendal artery |
| 10
.
| Inferior rectal nerve |
| 11
.
| Ischial spine (covered by fibers of coccygeus muscle) |
| 12
.
| Coccygeus muscle (overlying sacrospinous ligament) |
| 13
.
| Levator ani muscle (pointer on iliococcygeus muscle) |
| 14
.
| Obturator internus muscle |
| 15
.
| Upper pointer: Inferior rectal artery Lower pointer: Perineal artery |
| 16
.
| Lunate fascia (reflected to expose perineal vessels and nerves in pudendal canal) |
| 17
.
| Levator ani muscle (pointer on pubococcygeus muscle) |
| 18
.
| Anococcygeal nerve |
| 19
.
| Sacral cornu (horn) |
| 20
.
| Coccygeal cornu (horn) |
| 21
.
| Aperture for dorsal ramus of fifth sacral nerve |
| 22
.
| Dorsal superficial sacrococcygeal ligament |
| 23
.
| Upper pointer: Deep dorsal sacrococcygeal ligament Lower pointer: Sacrotuberous ligament |
| 24
.
| Coccyx (terminal segment) |
| 25
.
| Lunate fascia |
| 26
.
| Inferior pelvic diaphragmatic fascia |
| 27
.
| Anococcygeal ligament |
| 28
.
| External anal sphincter muscle |
| 29
.
| Anus |
