A sequence of two rotations--50 degrees torso flexion followed by +/-120 degrees of head axial rotation--was monitored using (essentially) goniometers and simultaneously measured by Euler XZY an YZX decompositions of marker data from an electromagnetic system (Flock of Birds).
Crawford
Neil R
NR
D002574:Cervical Vertebrae / Q000502:physiology*; D006801:Humans; D009333:Neck / Q000502:physiology*; D016059:Range of Motion, Articular; D012399:Rotation