| 1
.
| Upper pointer: Intercostal nerve IX Lower pointer: Spinal ganglion (lying within intervertebral foramen) |
| 2
.
| Costotransverse ligament (attached posteriorly to transverse process of vertebrae Th. X) |
| 3
.
| Azygos vein |
| 4
.
| Head of rib joint (pointers indicate facets on adjacent vertebral bodies, the cleft between being occupied by the delicate intraarticular ligament) |
| 5
.
| Radiate ligament |
| 6
.
| Anterior longitudinal ligament (pointer also indicates body of vertebra Th. X) |
| 7
.
| Intervertebral disc Th. X - XI |
| 8
.
| Hemiazygos vein (note small veins draining vertebral bodies at higher levels). |
| 9
.
| Posterior intercostal vein VIII |
| 10
.
| Posterior intercostal artery VIII |
| 11
.
| Sympathetic trunk (cut off, also see 24) |
| 12
.
| Joint at head of rib IX (intact) |
| 13
.
| Intercostal nerve VIII |
| 14
.
| Costal pleura |
| 15
.
| Rib IX |
| 16
.
| Superior costotransverse ligament (upper pointer, anterior division; lower pointer, posterior division) |
| 17
.
| Branch of ninth intercostal nerve to levator costarum muscle |
| 18
.
| Lateral costotransverse ligament |
| 19
.
| Levator costarum muscle |
| 20
.
| Borders of area occupied by tenth rib |
| 21
.
| Transverse costal facet (covered with articular cartilage) |
| 22
.
| Innermost intercostal muscle |
| 23
.
| Intercostal nerve X (cut off) |
| 24
.
| Left pointer: Sympathetic trunk (cut off, also see 1-1) Right pointer: Ramus communicans |
| 25
.
| Ganglion of sympathetic trunk |
