Median sacral crest

Definition

The median sacral crest is a ridge formed by the fused spinous processes of the sacral vertebrae, situated on the posterior surface of the sacrum. It represents the junction where the spinous processes have merged in the midline.

Related terms

Sacrum: The triangular bone at the base of the spine that is formed by the fusion of five individual sacral vertebrae.

Spinous process: A bony projection off the posterior (back) part of each vertebra that can be felt as a bump along the spine.

Vertebral column: The flexible column formed by a series of bones called vertebrae, which houses and protects the spinal cord