From: Appraisal of the DIERS method for calculating postural measurements: an observational study

Spine shape parameters by subgroup | Definition |
---|---|

Localization and distance | |

Trunk length VP-DM, mm | The distance from VP to DM |

Trunk length VP-SP, mm | The distance from VP to the SP |

Trunk length VP-SP, % | The distance of VP-SP expressed as a percentage of VP-DM |

Dimple distance, mm | The distance from DL to DR |

Dimple distance, % | The distance of DL to DR expressed as a percentage of VP-DM |

Trunk and pelvis imbalances | |

Trunk inclination VP-DM, ° | The angle between the line connecting VP-DM and an external vertical line |

Trunk inclination VP-DM, mm | The distance between VP and the connecting external vertical line |

Trunk imbalance VP-DM, ° | The angle between the line connecting VP-DM and a vertical line through VP |

Trunk imbalance VP-DM, mm | The lateral distance between VP and DM |

Pelvic tilt DL-DR, ° | The angle between the line connecting DL and DR and an external horizontal line |

Pelvic tilt DL-DR, mm | The difference in height between DL and DR |

Pelvic torsion DL-DR, ° | The torsion of the surface normals of DL and DR |

Pelvic inclination dimples, ° | The mean vertical components of the surface normals at DL and DR |

Rotation correction pelvis, ° | In the frontal plane the angle of rotation of DR in the frontal plane in relation to DL |

Spinal reference points | |

Inflection point ICT, mm | The point of maximum positive surface inclination above the KA |

Kyphotic apex, mm | The location of the posterior apex of the sagittal profile |

Inflection point ITL, mm | The point of maximum negative surface inclination between the KA and the LA |

Lordotic apex, mm | The location of the frontal apex of the sagittal profile in the lower region |

Inflection point ILS, mm | The point of maximum positive surface inclination in the region between the LA and the sacrum |

Fleche cervicale, mm | The horizontal distance between the cervical apex and the tangent through the KA |

Fleche lombaire, mm | The horizontal distance between the LA and the tangent through the KA |

Fleche cervicale VP, mm | The horizontal distance between the VP and the KA |

Spinal curve measurements | |

Kyphotic angle ICT-ITL, ° | The angle between the surface tangents from the ICT and ITL |

Kyphotic angle VP-ITL, ° | The angle between the surface tangents from VP and ITL |

Kyphotic angle VP-T12, ° | The angle between the surface tangents on VP and the location of the calculated T12 |

Lordotic angle ITL-ILS, ° | The angle between the surface tangents from ITL and ILS |

Lordotic angle ITL-DM, ° | The angle between the surface tangents from ITL and DM |

Lordotic angle T12-DM, ° | The angle between the surface tangents from T12 and DM |

Pelvic inclination, ° | The angle of the vertical surface normals from the horizontal of DM |

Spinal deviation | |

Surface rotation RMS, ° | The RMS of the horizontal components of the surface normals on the symmetry line |

Surface rotation, ° | The maximum value of the horizontal components of the surface normals on the symmetry line |

Surface rotation right ° | The maximum value of the horizontal components of the surface normals on the symmetry line to the right |

Surface rotation left, ° | The maximum value of the horizontal components of the surface normals on the symmetry line to the left |

Surface rotation amplitude, ° | The maximal spinal torsion calculated from the maximal rotation to the right and the left |

Trunk torsion, ° | The maximal value of the horizontal components on VP compared to the horizontal components of the symmetry line on DM |

Lateral deviation RMS, mm | The RMS deviation of the midline of the spine from the direct connection of VP-DM in the frontal plane |

Lateral deviation, mm | The maximum deviation of the midline of the spine from the direct connection of VP-DM in the frontal plane |

Lateral deviation right, mm | The maximum deviation of the midline of the spine from the VP-DM line to the right |

Lateral deviation left, mm | The maximum deviation of the midline of the spine from the VP-DM line to the left |

Lateral deviation amplitude, mm | The sum of the maximum deviation of the right and the left lateral deviation values |