Takasaki Hiroshi, Hall Toby, Oshiro Sadanori, Kaneko Shouta, Ikemoto Yoshikazu, Jull Gwendolen
Division of Physiotherapy, School of Health and Rehabilitation Science, The University of Queensland, Brisbane, Queensland 4072, Australia.
Man Ther. 2011 Apr;16(2):167-71. doi: 10.1016/j.math.2010.10.002. Epub 2010 Nov 4.
The Flexion-Rotation Test (FRT) is proposed to assess mobility primarily at C1-C2. However, there is no in vivo measurement investigating the validity of the FRT. The purpose of this study was 1) to examine measurement reliability of segmental upper cervical movements using magnetic resonance imaging and 2) to investigate the content validity of the FRT. Nineteen asymptomatic female subjects (mean age: 22.2 years) were evaluated with a 0.2-T horizontally open MRI unit. The segmental rotation angles from Occiput-C1 to C3-C4 and the C4 vertebra were assessed with the head maximally rotated to both the right and the left in two conditions - neck in neutral and in flexion. Good reliability of the method of measurement was suggested by error considerations. A repeated measure ANOVA revealed an interaction between the two different neck starting positions and segment levels (P < 0.0001). Post-hoc analysis revealed that there were significant reductions in the flexed position (P < 0.0001) except for at Occiput-C1. While there was only a 16.3% reduction in rotation range at C1-C2, the reduction was 68.1% at C2-C3, 61.4% at C3-C4, and 76.9% at segments below C4, respectively, supporting the content validity of the FRT as a clinical measure of atlanto-axial mobility.
屈曲-旋转试验（FRT）旨在主要评估C1-C2节段的活动度。然而，尚无体内测量来研究FRT的有效性。本研究的目的是：1）使用磁共振成像检查上颈椎节段运动的测量可靠性；2）研究FRT的内容效度。19名无症状女性受试者（平均年龄：22.2岁）接受了0.2T水平开放式MRI设备的评估。在两种情况下，即颈部处于中立位和屈曲位时，将头部最大限度地向左右旋转，评估从枕骨-C1到C3-C4以及C4椎体的节段旋转角度。通过误差分析表明测量方法具有良好的可靠性。重复测量方差分析显示，两种不同的颈部起始位置与节段水平之间存在交互作用（P < 0.0001）。事后分析显示，除枕骨-C1外，屈曲位时均有显著降低（P < 0.0001）。虽然C1-C2节段的旋转范围仅降低了16.3%，但C2-C3节段降低了68.1%，C3-C4节段降低了61.4%，C4以下节段降低了76.9%，这支持了FRT作为寰枢椎活动度临床测量方法的内容效度。
