1
.
| Rib XII |
2
.
| External oblique muscle (origin) |
3
.
| Intercostal nerve XI |
4
.
| Internal oblique muscle (reflected medially) |
5
.
| Transversus abdominis muscle (covered by fascia) |
6
.
| External oblique muscle (insertion) |
7
.
| Upper pointer: Deep circumflex iliac artery (ascending branch) Lower pointer: Iliohypogastric nerve |
8
.
| Serratus posterior inferior muscle (lowest insertion) |
9
.
| Thoracolumbar fascia (posterior lamina, reflected) |
10
.
| Thoracic nerve XII (subcostal nerve) |
11
.
| Erector spinae muscle |
12
.
| Internal oblique muscle (origin, cut across) |
13
.
| Iliac crest |
14
.
| Superior cluneal nerves |