Both intervertebral disc and facet j oint dominated by duplicated sensory nerve.Injury and sterility inflam mation of them cause low back pain.

• 椎间盘和椎间关节具有多重感觉神经支配,椎间盘的损伤和椎间关节的无菌性炎症产生疼痛,神经根的受压和炎症刺激使疼痛敏化。