［摘 要］ 在经络系统的20经脉中，入脑者只有5条，脑内循行路径也很模糊。电生理及影像学研究表明，针灸腧穴产生的信号可传入脑，且不以腧穴所属经脉是否入脑为限。据此，笔者提出“十二经脉皆入脑”的假设，以构建“脑内经络”假说。经络理论体系中入脑经脉少、脑内循行路径不甚清楚，可能与经络发现的手段以感觉为主有关。今后应利用现代科技手段，加强经络在脑内循行的研究，以完善经络理论。
Hypothesis on "all the 12 channels entering the brain"XU Fang-ming, XIE Peng, MOU Jun, YANG De-yu (Section of Neurology, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China)ABSTRACT Out of the 20 channels in the channel and collateral system, only 5 enter the brain, with unclear circulation pathway in the brain. Electrophysiologic and imaging studies indicate that the signal induced by acupuncture at acupoints can enter the brain no matter whether the channel connecting the acupoint enters the brain.Therefore, the authers put forward the hypothesis of "all the 12 channels enter the brain", i.e., the hypothesis of "channels and collaterals in brain". In the theory system of channels, less channels enter the brain with unclear circulation pathway. This possibly is related with that sensation is main way for descovery of channels. In future, we should adopt modern scientific and technical ways and strengthen the study on circulation of channels in the brain, so as to perfect the channel theory. ......