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Superiorly the atlas articulates with the occiput to form the Atlanto-occipital joint which allows the head to nod up and down on the vertebral column. Inferiorly the atlas articulates with the dens which acts as a pivot that allows the atlas and attached head to rotate on the axis. This is the Atlanto-axial joint.THE ATLAS. The first cervical vertebra, or atlas, articulates with the occiput rostrally and the axis caudally. It consists of two articulating lateral masses that are connected anteriorly and posteriorly by neural arches (Fig. 2-3).The atlas and axis in particular work with the ligaments to move the neck. The atlas and the occipital bone form the atlanto-occipital joint, which allows neck flexion. When you nod your head as if to say “yes,” that is neck flexion. The atlas and axis form the atlanto-axial joint, which allows head rotation.
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What does the atlas articulate with?
THE ATLAS. The first cervical vertebra, or atlas, articulates with the occiput rostrally and the axis caudally. It consists of two articulating lateral masses that are connected anteriorly and posteriorly by neural arches (Fig. 2-3).
How do the atlas and axis work together?
The atlas and axis in particular work with the ligaments to move the neck. The atlas and the occipital bone form the atlanto-occipital joint, which allows neck flexion. When you nod your head as if to say “yes,” that is neck flexion. The atlas and axis form the atlanto-axial joint, which allows head rotation.
Atlas Axis Cervical Vertebrae (C1-C2) Anatomy
Images related to the topicAtlas Axis Cervical Vertebrae (C1-C2) Anatomy
Does the axis articulate with the skull?
The facets articulate with rounded condyles on the underside of the skull’s occipital bone. This junction allows the head to nod up and down. Directly below the atlas bone is the axis bone (C2). Pivot and gliding joints linking the two bones allow the head to move side-to-side.
What are two articulations to the axis?
The axis is composed of a vertebral body, heavy pedicles, laminae, and transverse processes, which serve as attachment points for muscles. The axis articulates with the atlas via its superior articular facets, which are convex and face upward and outward.
What is the difference between the atlas and the axis?
The atlas is the first cervical (neck) vertebra which is just under the head; it is named for Atlas, the Greek god who supported the world on his shoulders. The axis is the second cervical vertebra; it has what is called the odontoid process about which the atlas rotates.
What part of the skull articulates with the atlas?
1 Anatomy. The occipital bone is set at the rear of the cranium and articulates with the temporals, sphenoid, parietals, and the uppermost vertebra, the atlas.
What do the atlas and axis do?
The atlas and axis support the head on the lower cervical spine while providing for considerable mobility in flexion, extension, rotation and lateral bending. The first two vertebrae also function as conduits for the cervical cord and vertebral arteries.
See some more details on the topic How do the axis and Atlas articulate? here:
3D Skeletal System: Atlas, Axis, and the Atlanto-Axial …
The atlas and axis in particular work with the ligaments to move the neck. The atlas and the occipital bone form the atlanto-occipital joint, …
Axis – Physiopedia
The axis articulates with the atlas via its superior articular facets, which are convex and face upward and outward.
First Cervical Vertebra – an overview | ScienceDirect Topics
The articulation between the atlas and axis, known as the atlantoaxial joint, contributes to most of the cervical rotation. Unlike the atlas, the axis does …
Atlas (anatomy) – Wikipedia
The atlas is the topmost vertebra and, with the axis (the vertebra below it), forms the joint connecting the skull and spine. The atlas and axis are specialized …
What is the axis and atlas joint?
The atlantoaxial joint is a type of synovial joint that is classified as a biaxial, pivot joint. This joint resides in the upper part of the neck between the first and second cervical vertebrae, also known as the atlas and axis, respectively.
What is special about the atlas and axis?
The atlas and axis are specialized to allow a greater range of motion than normal vertebrae. They are responsible for the nodding and rotation movements of the head. The atlanto-occipital joint allows the head to nod up and down on the vertebral column.
Where does C1 articulate?
The atlas (plural: atlases) is the first cervical vertebra, commonly called C1. It is an atypical cervical vertebra with unique features. It articulates with the dens of the axis and the occiput, respectively allowing rotation of the head, and flexion, extension and lateral flexion of the head.
Atlas and axis vertebrae
Images related to the topicAtlas and axis vertebrae
Which bone articulates with the dens?
The atlas articulates with the dens from the axis. A typical thoracic vertebra is distinguished by its long, downward projecting spinous process. Thoracic vertebrae also have articulation facets on the body and transverse processes for attachment of the ribs.
What articulates with C1?
C1 serves as a ring or washer that the skull rests upon and articulates in a pivot joint with the dens or odontoid process of C2.
How does C2 the axis interface with C1 the atlas in the cervical spine?
The C1 and C2 vertebrae are connected in the back by a pair of facet joints. The ring-shaped atlas rotates around the dens, which is the peg-like bony projection of the axis.
What does the dens of C2 articulate with?
The unique features of C2 anatomy and its articulations make assessment of its pathology challenging. The odontoid process (dens) is a vertical projection that lies just posterior to the anterior arch of C1, has ligamentous attachments to the skull base, and articulates with C1 (atlas).
Is the atlas and axis a pivot joint?
The pivot joint is exemplified by the joint between the atlas and the axis (first and second cervical vertebrae), directly under the skull, which allows for turning of the head from side to side.
What structure is responsible for articulating with the vertebral column?
Superiorly, the C1 vertebra articulates (forms a joint) with the occipital condyles of the skull. Inferiorly, C1 articulates with the C2 vertebra, and so on. Below these are the 12 thoracic vertebrae, designated T1–T12. The lower back contains the L1–L5 lumbar vertebrae.
What does the atlas articulate with which allows you to nod yes?
The atlas (C1) lacks a body and spinous process, and its superior articulating processes (facets) articulate with the occipital condyles of the skull, permitting the head movement used in nodding “yes”.
Where does the atlas articulate with the skull quizlet?
The atlas is the first cervical vertebra and articulates at its superior surface with the occipital condyles on the occipital bone of the skull. Note that the superior articulating facets on the atlas are larger than the inferior articulating facets which articulate with the axis, the second cervical vertebra.
Cervical vertebrae: Atlas Axis
Images related to the topicCervical vertebrae: Atlas Axis
Is C1 The atlas or axis?
The C1 and C2 vertebrae are the first two vertebrae of the cervical spine. They are also called the atlas and axis vertebrae.
How does the skull attached to the spine?
The occipital bone is the only bone in your head that connects with your cervical spine (neck). The occipital bone surrounds a large opening known as the foramen magnum. The foramen magnum allows key nerves and vascular structures passage between the brain and spine.
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