The movement at the following joint permits a person to say NO by head movement:
Ans. (b) Atlanto-axial jointRef: Gray's 38th ed/521* Atlanto-occipital (between skull and Cl) joint permit nodding of head (as when indicating approval or yes) and,* Atlantoaxial joint permits the head to be turned from side to side i.e. rotation (as indicating disapproval, the NO movement).
Atlanto-occipital joint
Atlanto-axial joint
C2-C3 joint
C3-C4 joint
Osteology of Head and Neck