Which vertebral bone articulates with the bone above it to allow your head to move from side-to-side when you say “no”?

Head rotation  The atlas and axis form the atlanto-axial joint, which allows head rotation.

Explanation:

If you shake your head as if to say "no," that is head rotation.

answer; eat a strict gluten-free diet;

the trait of personality falls in the middle of the diagram because personality is a mixture of ones nature and environment.