| 1
.
| Piriform muscle |
| 2
.
| Sacral plexus |
| 3
.
| Superior gluteal artery and vein |
| 4
.
| Right pointer: Inferior gluteal nerve Left pointer: Posterior femoral cutaneous nerve |
| 5
.
| Superior gluteal nerve |
| 6
.
| Gluteus minimus muscle |
| 7
.
| Body of ischium (covered by periosteum) |
| 8
.
| Sciatic nerve |
| 9
.
| Piriform muscle (tendon of insertion, cut off) |
| 10
.
| Greater trochanter (covered by tendon of Gluteus medius muscle) |
| 11
.
| Obturator internus muscle (tendon of insertion) |
| 12
.
| Upper pointer: Obturator externus muscle Lower pointer: Medial femoral circumflex artery |
| 13
.
| Sacral bone |
| 14
.
| Inferior gluteal artery |
| 15
.
| Inferior cluneal nerve (medial) |
| 16
.
| Internal pudendal vein (cut off) |
| 17
.
| Lymph node |
| 18
.
| Perforating cutaneous nerve |
| 19
.
| Nerve to obturator internus |
| 20
.
| Inferior rectal nerve |
| 21
.
| Upper pointer: Sacrospinal ligament Lower pointer: Pudendal nerve (slightly elevated) |
| 22
.
| Internal pudendal artery and vein |
| 23
.
| Levator ani muscle |
| 24
.
| Sacrotuberous ligament (divided and retracted) |
| 25
.
| Deep transverse perineal muscle |
| 26
.
| Ischial tuberosity |
| 27
.
| Gemelli muscles |
| 28
.
| Artery supplying sciatic nerve |
| 29
.
| Quadratus femoris muscle |
