Body-surface connection law and its material basis based on the theory of'treatment of the back pain at the Weizhong(BL40)acupoint'
The clinical guiding sentence'treatment of the back pain at the Weizhong(BL40)acupoint'is included in The Complete Compendium of Acupuncture and Moxibustion,which is still widely used in clinical practice.Predecessors summarized this rule based on clinical experience and clinical practice,while later generations explained this rule using channels and collaterals,and took'Weizhong(BL40)point-bladder meridian of foot sun-lumbar area'as its theoretical support.With the advancement of science and technology,however,a more objective viewpoint may provide new interpretation and support for'treatment of the back pain at the Weizhong(BL40)acupoint'.The authors attempt to discuss its scientific connotation from multiple perspectives,including physical and chemical properties,neuroanatomy,neuroimaging,skin microcirculation,and musculoskeletal lesions,based on existing clinical and basic research.