Spinous process

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Bone: Spinous process
Processusspinosusvertebrae.png
A cervical vertebra. (Spinous process labeled at bottom.)
Gray85.png
Side view of a typical cervical vertebra. (Spinous process labeled at right.)
Latin processus spinosus vertebrae
Gray's subject #20 97

The spinous process of a vertebra is directed backward and downward from the junction of the laminae (in humans), and serves for the attachment of muscles and ligaments. In animals without an erect stance, the process points upward and may slant forward or backward. Spinous processes are exaggerated in some animals, such as the extinct Dimetrodon and Spinosaurus, where they form a sail- or finback.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

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