The prevalence of redundant nerve roots in patients with lumbar spinal stenosis is body position dependent: a retrospective observational study with repeated measures design in an upright MRI scanner

摘要

Sagittal T2-weighted images of the lumbar spine showing cauda equina nerve roots: with no evidence of RNRs since the morphology of the cauda nerve roots is not affected by the stenosis at level L4/L5; with serpentine-shaped RNRs (white arrows) caudally to the stenosis at level L3/L4 and with loop-shaped RNRs (white arrows) cranially to the stenosis at level L2/L3