Fig. 2. (A) Midline sagittal T2-weighted magnetic resonance imaging of the cervical spine in the neutral position reveals normal contour and intramedullary high signal intensity along the fourth to sixth cervical vertebral levels without cervical cord compression. (B) On sagittal T2-weighted images in the flexed neck position, there is anterior shifting of posterior dural sac below the third cervical vertebral level, compressing the spinal cord from third to sixth cervical vertebral levels (arrow).