Guiding significance of the autophagy intensity of lumbar intervertebral discs and the Charlson Comorbidity Index in predicting the postoperative curative effect of patients with single level lumbar disc herniation Scientific Reports Lumbar Disc Herniation: Case Study Spine Institute of SD Non Surgical Neck Pain Relief for Degenerative & Bulging Cervical Discs The intradiscal pressure of the lumbar spine is affected by intervertebral disc degeneration, age, level, and motion direction: evaluation of an in vitro database comprising 107 specimens ScienceDirect