Questioning the Fundamentals of Jiao's Scalp Acupuncture: Point-positioning Based on the Hypothesis of the Cerebral Cortex's Functional Zone

Shunfa Jiao, the founder of the major school of scalp acupuncture (SA), and several other authors, have speculated that SA can effectively treat diseases or disorders through needling of the external scalp zones projected from the cerebral cortex's internal function zones that are directly underneath.The review intended to analyze and discuss the historical development of Jiao's SA system, the composition of Jiao's SA stimulation zones, and the projection of the cerebral cortex's function zones on the scalp, to correct the shortcomings and inaccuracies of Jiao's hypothesis and accelerate the development of SA and its clinical application based on solid evidence.The research team performed a narrative review based on the literature currently available. The research team searched PubMed, Cochrane, Webscience, CNKI (China National Knowledge Infrastructure), Wangfang, Google Scholar and Baidu Scholar databases. The search used the keywords: "Scalp acupuncture, head acupuncture, Jiao Shunfa, functional zone of cerebral cortex, history" in both English and Chinese.The study was conducted in Shanghai Bailing Tianshou Clinic of Chinese Medicine, Shanghai, People's Republic of China, and McLean Center for Complementary and Alternative Medicine, Vienna, VA, USA.The nineteen stimulation zones in Jiao's SA system are actually a mixture of Jiao's speculation on SA and other authors' clinical experiences, and are confusing. The five zones on the forehead and the nasopharyngeal-mouth-tongue, madness control, spirit-emotional zones as well as the balance zone, chore-tremor control zone, and vascular movement center-more than 57% of the zones-aren't related to the projection on the scalp of the cerebral cortex's function zones directly underneath. Jiao didn't discover the five zones on the forehead through his findings of acupuncture-sensation transmission to organs, but rather Yunpeng Fang identified them in his study of SA. The nasopharyngeal-mouth-tongue, madness control, spirit-emotional zones are also others' finding. Jiao's projection of the cerebral cortex's function zones on the scalp was merely an adoption of a series of brain-surgery marks that surgeons draw before neurosurgery, which correlate external skull locations with underlying cortical areas. That Jiao believed that needling those lines could treat cerebrovascular diseases or disorders was an unfounded guess on his part. In fact, the effects of stimulating such functional zones to treat such diseases that Jiao found weren't ideal. Furthermore, Jiao's SA system has nothing to do with the integration of Chinese and Western medicine.Scientific evidence hasn't confirmed Jiao's hypothesis nor has that hypothesis followed from the development of neuroscience. Jiao insistence on his hypothesis seriously hindered the research and development of SA therapy. Clinical trials and experimental studies on acupuncture, especially using an fMRI, are warranted to evaluate SA's therapeutic value and to identify the functional changes of various parts of the brain that acupuncture on the scalp can cause.