Pages Below:
| |
- formed from 5 rudimentary vertebrae
- fused to form single bone
Joints
- upper border articulates with fifth lumbar vertebra
- inferior border articulates with coccyx
- lateral borders articulate with iliac bones
Parts
- sacral promontory
- anterior and upper margins of sacrum bulge forward
- sacral canal
- contains
- anterior and posterior roots of lumbar, sacral and coccygeal
spinal nerves
- filum terminale
- fibrofatty material
- subarachnoid space to lower border second sacral vertebra
- sacral hiatus
- failure of fifth (and sometimes fourth) scaral lamina to meet in
midline
- posterior and anterior foramina (4 each side)
- sacral cornua
- two extensions of sarcral lamina at asacral hiatus
|