title: [Three-dimensional anatomical position of rotatory center in cervical rotatory and local manipulation].
abstract: OBJECTIVE
  To investigate the three-dimensional anatomical position of the rotatory center in cervical rotatory and local manipulation.
  
  
  METHODS
  A three-dimensional model was constructed based on CT data from cadaveric specimens of axial spinous process deviation. Cervical rotation was simulated on this model, and the graphic outcome was analyzed.
  
  
  RESULTS
  The rotatory center of this model was at the dens axis, not at the apex of the axial spionus process, and the angle of rotation exceeded observable angle.
  
  
  CONCLUSIONS
  The new concept of anisotropic rotation of the cervical vertebrae should be established and its principles must be comprehended in clinical practice of cervical rotatory manipulation.
authors.affiliation: Department of Orthopedics, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China. yeswangz@126.com
authors.forename: Lei
authors.initials: L
authors.lastname: Wan
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.forename: Yi-kai
authors.initials: YK
authors.lastname: Li
mesh_terms: D000328:Adult; D002102:Cadaver; D002574:Cervical Vertebrae / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D020393:Manipulation, Spinal / Q000379:methods*; D016059:Range of Motion, Articular; D012399:Rotation; D014057:Tomography, X-Ray Computed