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Sacral hiatus
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:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/sacral-hiatus/rwLprKObN1vg9LcGaIUDow_281Sacral_hiatus_magnified.png "Sacral hiatus (Hiatus sacralis); Image: Liene Znotina"){kind=logo}
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The sacral hiatus corresponds to the posterior distal opening of the sacral canal at vertebral level S3-S4.
It is roughly triangular in shape and it is laterally bounded by the sacral horns (sacral cornu).
The sacral hiatus contains the fifth sacral nerve, coccygeal nerve roots, filum terminale as well as fibro-fatty tissue.
It is covered posteriorly by the sacrococcygeal ligament, subcutaneous fatty tissue and skin. Thus, it can be easily accessed and is therefore used as the site for caudal epidural injections.
| Terminology |
English: Sacral hiatus Latin: Hiatus sacralis |
| Definition | The sacral hiatus corresponds to the posterior distal opening of the sacral canal at vertebral level S3-S4. |
Eager to learn more about the anatomy of the sacrum? Then dive straight into the following study unit:
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