Diagnostic value of cauda equina motor conduction time in lumbar spinal stenosis

► The prolongation of cauda equina motor conduction time was statistically significant in the lumbar spinal stenosis (LSS) group. ► Lumbar laminar electrical stimulation is an easy and reliable method to demonstrate motor conduction delay in cauda equina. ► In LSS, chronic compression may occur earlier in the cauda equina root fibers within the spinal canal.