Which cervical vertebra is known as the atlas?

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Prepare for the NREMT AEMT Test. Study with flashcards and multiple-choice questions. Each question includes hints and explanations. Get ready for your exam now!

Multiple Choice

Which cervical vertebra is known as the atlas?

Explanation:
The atlas is the first cervical vertebra. It supports the skull and forms the atlanto-occipital joints with the occipital bones, which lets you nod your head up and down. It’s unique because it’s ring-shaped and lacks a true vertebral body, consisting instead of anterior and posterior arches with lateral masses that bear the superior articular surfaces. The axis is the second cervical vertebra and has a prominent dens (odontoid process) that acts as a pivot for the atlas and skull, enabling rotation of the head. The other cervical vertebrae (C3–C7) are typical vertebrae with bodies and the usual processes. So, the atlas is the first cervical vertebra.

The atlas is the first cervical vertebra. It supports the skull and forms the atlanto-occipital joints with the occipital bones, which lets you nod your head up and down. It’s unique because it’s ring-shaped and lacks a true vertebral body, consisting instead of anterior and posterior arches with lateral masses that bear the superior articular surfaces. The axis is the second cervical vertebra and has a prominent dens (odontoid process) that acts as a pivot for the atlas and skull, enabling rotation of the head. The other cervical vertebrae (C3–C7) are typical vertebrae with bodies and the usual processes. So, the atlas is the first cervical vertebra.

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