1
.
| Lateral cutaneous branch of dorsal branch thoracic nerve XII |
2
.
| Spinous process vertebra L. II |
3
.
| Inferior articular process vertebra L. II |
4
.
| Longissimus thoracis muscle |
5
.
| Iliocostalis muscle |
6
.
| Thoracolumbar fascia |
7
.
| Multifidus muscle (cut across near origin from mammillary process) |
8
.
| Superficial fascia |
9
.
| Dura mater |
10
.
| Fibrous strands attaching dura to sacrum |
11
.
| Gluteus maximus muscle |
12
.
| Fascia of latissimus dorsi muscle |
13
.
| Aponeurosis of latissimus dorsi muscle |
14
.
| Layer of fascia beneath thoracolumbar fascia |
15
.
| Posterior internal vertebral venous plexus |
16
.
| Laminal arch of vertebra L. III (cut across) |
17
.
| Laminal arch of vertebra L. IV (cut across) |
18
.
| Laminal arch of vertebra L. V (cut across) |
19
.
| Laminal arch of sacrum (cut across) |
20
.
| Sacral nerve I |
21
.
| Dural filum terminale (coccygeal nerve roots accompany this band) |