Question

The articulation of atlas, the first vertebrae facilitates

• A. Rotatory motion
• B. Sliding motion
• C. Sideways motion
• D. One way motion

Answer 1

The correct option is A Rotatory motion

The atlas bone is the first ( C1) of the seven cervical vertebrae which support the skull. The atlas does not have a body or spinous processes and is a bony ring made up of anterior and posterior arches and two lateral masses. On the surface of the atlas bone is a pair of concave faucets which articulate with rounded condyles on the underside of the occipital bone which allows for the nodding and rotatory motion.