| Front | Vertebral Column: Sacral Region |
|---|---|
| Back | Structure: 5 vertebrae (S1-5) fused into the sacrum, which forms the sacral curvature. a) Anterior (pelvic) surface has anterior (pelvic) sacral foramina b) Dorsum of sacrum (posterior) has median sacral crest and dorsal (posterior) sacral foramina c) Sacral canal runs under the median sacral crest and ends at the sacral hiatus Functions: 1. Articulate with lumbar vertebrae at lumbosacral joint 2. Pelvic sacral foramina transmit ventral rami of sacral spinal nerves 3. Dorsal sacral foramina transmit dorsal rami of sacral spinal nerves 4. Sacral hiatus allows caudal epidural nerve block |
Tags: osteology
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