title: Development of a computerized intervertebral motion analysis of the cervical spine for clinical application.
abstract: OBJECTIVE
  The objective of this study was to develop a measurement method that could be implemented in chiropractic for the evaluation of angular and translational intervertebral motion of the cervical spine.
  
  
  METHODS
  Flexion-extension radiographs were digitized with a scanner at a ratio of 1:1 and imported into a software, allowing segmental motion measurements. The measurements were obtained by selecting the most anteroinferior point and the most posteroinferior point of a vertebral body (anterior and posterior arch, respectively, for C1), with the origin of the reference frame set at the most posteroinferior point of the vertebral body below. The same procedure was performed for both the flexion and extension radiographs, and the coordinates of the 2 points were used to calculate the angular movement and the translation between the 2 vertebrae.
  
  
  RESULTS
  This method provides a measure of intervertebral angular and translational movement. It uses a different reference frame for each joint instead of the same reference frame for all joints and thus provides a measure of motion in the plane of each articulation. The calculated values obtained are comparable to other studies on intervertebral motion and support further development to validate the method.
  
  
  CONCLUSIONS
  The present study proposes a computerized procedure to evaluate intervertebral motion of the cervical spine. This procedure needs to be validated with a reliability study but could provide a valuable tool for doctors of chiropractic and further spinal research.
authors.affiliation: Department of Chiropractic, University of Quebec at Trois-Riviéres, Trois-Riviéres, Quebec, Canada. mathieu.piche@umontreal.ca
authors.forename: Mathieu
authors.initials: M
authors.lastname: Piché
authors.forename: Pierre
authors.initials: P
authors.lastname: Benoît
authors.forename: Julie
authors.initials: J
authors.lastname: Lambert
authors.forename: Virginie
authors.initials: V
authors.lastname: Barrette
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Grondin
authors.forename: Julie
authors.initials: J
authors.lastname: Martel
authors.forename: Amélie
authors.initials: A
authors.lastname: Paré
authors.forename: André
authors.initials: A
authors.lastname: Cardin
mesh_terms: D053587:Arthrometry, Articular / Q000379:methods*; D001696:Biomechanical Phenomena; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging* / Q000502:physiology*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D009068:Movement; D010808:Physical Examination / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D012016:Reference Values; D015203:Reproducibility of Results; D012399:Rotation; D012680:Sensitivity and Specificity