1
.
| Mamillary process vertebra L. III |
2
.
| Inferior articular process vertebra L. II |
3
.
| Iliocostalis muscle |
4
.
| Lamina (arch of vertebra) L. IV |
5
.
| Thoracolumbar fascia |
6
.
| Ligamentum flavum |
7
.
| Epidural space and cut margin of dura |
8
.
| Fibrous attachment of dura to sacrum |
9
.
| Cystic enlargement of dura covering roots of second sacral nerve (note resorption of neighboring bone) |
10
.
| Gluteus maximus muscle |
11
.
| Spinous process vertebra L. II |
12
.
| Branch of lumbar artery |
13
.
| Dura mater |
14
.
| Arachnoid |
15
.
| Filum terminale (beneath arachnoid) |
16
.
| Sacral nerve II |
17
.
| Level at which spinal subarachnoid space terminates |
18
.
| Dural filum terminale |