Cervical flexion-rotation test

The CFRT (Figure 1) was performed in supine lying following the method described by Hall and Robinson[²]. Halo mounted sensors of a FASTRAK electromagnetic movement tracking device (Liberty, Polhemus, USA) were placed on the participant’s head and used to measure the magnitude of three separate passive rotation movements in each direction with the participant’s head maintained in maximum cervical flexion to isolate upper cervical rotation. The FASTRAK system has reported intra-observer reliability in measuring repeated cervical spine motion with intraclass correlation coefficient values ranging from 0.54 to 0.82[²⁷]. The CFRT has previously demonstrated sensitivity of 91% and specificity of 90% with an overall diagnostic accuracy of 91% in differentiating asymptomatic participants from CGH on the basis of a minimum 10° reduction in expected rotation range[⁶].

The cervical flexion rotation test (CFRT) with FASTRAK electromagnetic movement tracking device in-situ.