Alterations in primary and coupled neck motions after facetectomy.

  title={Alterations in primary and coupled neck motions after facetectomy.},
  author={R B Raynor and R Moskovich and P Zidel and Jeffrey Pugh},
  volume={21 5},
Normal neck motion is a complicated phenomenon. A primary motion results from an applied force or torque. Secondary coupled motions also result as a consequence of the primary motion. These resulting coupled motions were measured in isolated cervical motion segments using three-dimensional videophotogrammetry with a coordinate system fixed in space. A cross coupling algorithm provided error correction and conversion from local to true cartesian coordinates. The data were analyzed by computer… CONTINUE READING

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