The critical cutoff point of the Zurich Claudication Questionnaire and the Japanese Orthopaedic Association score indicating locomotive syndrome in patients with lumbar spinal canal stenosis.

Background: Locomotive syndrome (LS) is a condition of decreased mobility caused by disorders of the locomotive organs. Lumbar spinal stenosis (LSS) is a LS disorder. The Japanese Orthopaedic Association score (JOA score) and the Zurich Claudication Questionnaire (ZCQ) are international evaluation tools for LSS.

Sagittal alignment of cervical flexion and extension: lateral radiographic analysis.

Study Design: An analysis of lateral radiographs in the upright, flexion-extension position.

Objectives: To document and define the differences in cervical flexion-extension kinematics as they relate to changes of alignment in upright cervical lordosis.

Summary Of Background Data: No previous study has reported the association between sagittal plane cervical rotation kinematics and changes of alignment in upright cervical lordosis.