Anatomy
·Thorax & Spine
Sacrum & Coccyx
⭐ PREMIUM
The sacrum (5 fused vertebrae) transmits weight to the pelvis and is the site of the sacral hiatus for caudal anaesthesia.
FEATURES
• Triangular; base (promontory superiorly) → apex (joins the coccyx).
• Anterior + posterior sacral foramina (ventral + dorsal rami of S1–4).
• Sacral canal (continuation of the vertebral canal) ends at the SACRAL HIATUS (failure of the S5 laminae to fuse), flanked…
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