Amevo B, Macintosh J E, Worth D, Bogduk N
Faculty of Medicine, University of Papua New Guinea, Papua New Guinea.
Clin Biomech (Bristol). 1991 Feb;6(1):31-7. doi: 10.1016/0268-0033(91)90039-S.
The reliability of the conventional technique for determining the instantaneous axes of rotation of the cervical motion segments was evaluated by comparing the determinations made by two observers and the same observer on two separate occasions. Different observers found the same mean location for the instantaneous axis at each segment in a test population of 17 normal subjects, but for any given subject the interobserver and intraobserver differences were large, with a relative variation of up to 35%. Thus, while reliable for determining the mean location of the instantaneous axis of rotation in a population, the technique was not reliable for determining the axis in a given subject. Qualitative analysis suggested that the identification of the radiographic images of the vertebrae and their tracing is the greatest source of error for this technique.
通过比较两名观察者以及同一观察者在两个不同时间所做的测定，对用于确定颈椎运动节段瞬时旋转轴的传统技术的可靠性进行了评估。在17名正常受试者的测试群体中，不同观察者发现每个节段瞬时轴的平均位置相同，但对于任何给定的受试者，观察者间和观察者内的差异都很大，相对变化高达35%。因此，虽然该技术在确定群体中瞬时旋转轴的平均位置时可靠，但在确定给定受试者的轴时并不可靠。定性分析表明，椎骨放射影像的识别及其追踪是该技术最大的误差来源。
