Comparison of Surgical Outcomes Between Pre Sympathetic Plexus and Post Sympathetic Plexus Approach

This study compares two surgical approaches for a spinal fusion procedure called lateral lumbar interbody fusion (LLIF), used to treat degenerative disc disease in the lower back. The two approaches differ in how the surgeon navigates around a network of nerves in the area. The goal is to find out which approach leads to better outcomes and fewer complications. You may be eligible if: • You are between 20 and 80 years old • You have been diagnosed with lumbar degenerative disease • You need a spinal fusion of 1 to 2 levels between L2 and S1 • You have not had previous lumbar surgery You may NOT be eligible if: • You have had prior lumbar surgery • You have significant muscle weakness (motor grade III or lower) • You have a neuropsychiatric condition such as depression • You have inflammatory musculoskeletal disease or an active infection • You have cancer • You do not wish to participate in the study Talk to your doctor to see if this trial is right for you.