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Neck range of motion measurements using a new three-dimensional motion analysis system: validity and repeatability.

Haruhi Inokuchi1, Michio Tojima1,2, Hiroshi Mano1

  • 1Department of Rehabilitation Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
|April 8, 2015
PubMed
Summary

VICON, a 3D motion analysis system, accurately measures pure neck range of motion (ROM), outperforming the CROM device by excluding trunk movement. This advancement aids in assessing neck disorders and treatment effectiveness.

Keywords:
Motion analysisNeckRange of motionRepeatabilityValidity

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Area of Science:

  • Biomechanics
  • Musculoskeletal disorders
  • Rehabilitation engineering

Background:

  • Neck movement is crucial for daily activities, but neck disorders limit this mobility.
  • The Cervical Range of Motion (CROM) device is used to measure neck range of motion (ROM), but includes trunk motion.
  • A pure measurement of neck ROM is needed for accurate assessment and treatment evaluation.

Purpose of the Study:

  • To develop a novel method for measuring pure neck range of motion (ROM).
  • To utilize a 3D motion analysis system (VICON) for precise neck ROM measurements.
  • To assess neck ROM during flexion, extension, lateral bending, and rotation.

Main Methods:

  • Twelve healthy participants underwent neck ROM measurements using VICON and the CROM device.
  • Test-retest repeatability was evaluated using interclass correlation coefficients (ICCs), standard error of measurement (SEM), and minimal detectable change (MDC).
  • Validity between VICON and CROM was assessed using determination coefficients and Pearson's correlation coefficients.

Main Results:

  • VICON demonstrated substantial to almost perfect ICCs (0.786-0.962) for neck ROM.
  • Both systems showed low SEM and MDC values, indicating good repeatability.
  • High determination coefficients (R(2) = 0.607-0.745) and Pearson's correlation coefficients (r = 0.779-0.863) confirmed strong validity between VICON and CROM.

Conclusions:

  • The VICON system provides a reliable and valid method for measuring pure neck ROM.
  • VICON is a valuable tool for evaluating the effectiveness of interventions for neck disorders.
  • This technology can enhance the assessment of rehabilitation outcomes in physical therapy and post-surgical cases.