Atlas (C1)

Atlas

The atlas is a ring-shaped vertebra unique in lacking a vertebral body and spinous process. It consists of anterior and posterior arches connected by lateral masses. The superior articular facets are concave and cradle the occipital condyles of the skull.

Type Bone
Système corporel Skeletal
Région corporelle Spine
Nom latin Atlas
FMA ID 12519

Fonction

The first cervical vertebra that supports the skull. Allows nodding movements (flexion and extension) of the head at the atlanto-occipital joint.

Signification clinique

Jefferson fractures (burst fractures of the atlas) result from axial loading. Atlanto-occipital dislocation is usually fatal. Congenital anomalies include atlas assimilation (occipitalization).

Questions fréquentes

What is the Atlas (C1)?
The atlas is a ring-shaped vertebra unique in lacking a vertebral body and spinous process. It consists of anterior and posterior arches connected by lateral masses. The superior articular facets are concave and cradle the occipital condyles of the skull.
What is the function of the Atlas (C1)?
The first cervical vertebra that supports the skull. Allows nodding movements (flexion and extension) of the head at the atlanto-occipital joint.
What body system is the Atlas (C1) part of?
The Atlas (C1) is part of the Skeletal.
What conditions affect the Atlas (C1)?
Jefferson fractures (burst fractures of the atlas) result from axial loading. Atlanto-occipital dislocation is usually fatal. Congenital anomalies include atlas assimilation (occipitalization).
Where is the Atlas (C1) located?
The Atlas (C1) is located in the Spine region of the body.

Structures associées

fin bone bone of fin bone element bone bone fossa concavities subdivision of skeletal system skeletal system part skeletal joint articular joint radial element actinost Axis (C2) Axis skeleton set of all bones

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