Dens
Dens
Dens (/dɛnz/), also known as the odontoid process, is a protrusion of the C2 vertebra also known as the axis. It is named for its tooth-like shape.
Etymology
The term "dens" originates from the Latin word for "tooth," due to the tooth-like shape of this part of the vertebra. The term "odontoid" is derived from the Greek words "odontos" meaning "tooth" and "-oid" meaning "like," again referring to the tooth-like shape.
Anatomy
The dens is a strong, tooth-like process that projects upwards from the body of the axis. It serves as a pivot that allows the atlas and attached skull to rotate around it. The dens is held in place by the transverse ligament of the atlas, allowing for rotation of the head.
Related Terms
- Axis (anatomy): The second cervical vertebra, on which the head rotates.
- Atlas (anatomy): The first cervical vertebra, which supports the skull.
- Transverse ligament of the atlas: A strong band of tissue that holds the dens in place, allowing for head rotation.
See Also
External links
- Medical encyclopedia article on Dens
- Wikipedia's article - Dens
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