Abstract
Objective
This study aimed to assess the reliability and validity of an inertial measurement
unit (IMU)–based 3-dimensional (3D) angular measurement system for evaluating cervical
range of motion.
Methods
Thirty-three healthy participants (21.9 ± 2.1 years; 162.0 ± 6.0 cm; 55.8 ± 9.0 kg;
21.2 ± 2.4 kg/m2) were evaluated. Kinematic data of the cervical joints were simultaneously obtained
using the IMU 3D angular, goniometer, and photographic measurements during cervical
flexion (0°, 30°, and 50°), extension (30°, 50°), side-bending (0°, 20°, 40°), and
rotation (45°). Test–retest reliability was investigated in each measurement method.
Concurrent validity was assessed with the direct comparison between the IMU 3D angular
measurement and other methods.
Results
The IMU 3D angular measurement showed mostly good to high test–retest reliability
with relatively small standard error of measurement and the minimal detectable change
values. The concurrent validity of IMU 3D angular measurements in the cervical range
of motion was mostly reasonable. However, the measurement bias between the 2 methods
tended to be larger at the end range of each plane.
Conclusion
Using the IMU 3D angular measurement in cervical spine is recommended because of its
mostly good to high reliability and reasonable validity. However, using the IMU 3D
angular measurement at the end range of each plane should be carefully considered
owing to the poorer validity.
Key Indexing Terms
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Article Info
Publication History
Accepted:
June 1,
2018
Received in revised form:
May 28,
2018
Received:
September 22,
2017
Identification
Copyright
© 2019 by National University of Health Sciences.
