Question

The atlas is the first cervical vertebrae and has connections to?

1) the occiput
2) the axis
3) the dens
4) the mandible

Answer 1

The first cervical vertebra, known as the atlas, connects to the occiput, axis, and the dens of the axis. It does not have a connection to the mandible.

Step-by-step explanation:

The atlas, also known as the first cervical (C1) vertebra, is uniquely shaped to support the skull and facilitate its movements. The atlas forms articulations with several structures:

• It connects to the occiput at the base of the skull through the atlanto-occipital joint, allowing for nodding motions of the head.
• It articulates with the axis, which is the second cervical (C2) vertebra, thanks to its flat inferior articular processes.
• The strong transverse ligament holds the dens of the axis in place against the inner aspect of the anterior arch of the atlas, forming a pivot-type joint essential for head rotation.
• The atlas does not have any direct connections with the mandible (jawbone).

Therefore, the atlas has connections to the occiput, the axis, and specifically the dens, but not to the mandible.