 [ Symptoms ] would my laminectomy of l5s1 disk affect the disk above l4l5 causing it to herniate [ Disease ] in my opinion absolutely no there is no research that suggest that theory as the l5 s1 is below l4l5 so it is not causing pressure over it… but the mechanical disturbance of the vertebral column after the laminectomy can cause disturbance of the movement mechanics in a way that causes the upper discs to be having the same pattern if the back muscles and abdominal muscles were not strenghted enough after the operation … thanks