Atlas and Axis Overview Quiz

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Questions and Answers

What is the name of the first cervical vertebra?

Atlas

What is the name of the second cervical vertebra?

Axis

Identify the articulation site that allows us to nod our head 'yes'.

Occipital bone - atlas

Identify the articulation site that allows us to rotate our head, e.g. shaking the head 'no'.

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Identify the region of the skull that articulates with the atlas.

<p>Occipital condyles</p> Signup and view all the answers

Flashcards

Atlas

The first cervical vertebra, named for its role in supporting the head.

Axis

The second cervical vertebra, known for its unique structure, the odontoid process, that allows for head rotation.

Occipital bone - atlas articulation

This articulation between the occipital bone (back of the skull) and the atlas (first cervical vertebra allows nodding movement.

Atlas - axis articulation

This special articulation between the atlas (first cervical vertebra) and the axis (second cervical vertebra) is responsible for the head's rotational movement.

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Study Notes

Atlas and Axis Overview

The first cervical vertebra is called the Atlas. It is a specialized ring of bone designed to articulate with the skull.
The second cervical vertebra is known as the Axis (C2). It features the odontoid process, which allows for rotational movement with C1 (Atlas).

Articulation for Head Movements

The atlanto-occipital joint enables nodding of the head in a "yes" motion. This joint forms between the occipital condyles and the superior articular processes of the atlas.
A pivot joint between the Atlas and Axis facilitates head rotation. The dens on the axis serves as the pivot point, allowing the atlas to rotate around it.

Articulation Sites

The occipital condyles are located on either side of the foramen magnum and sit atop the atlas, forming the atlanto-occipital joint critical for head flexion and extension.