In this episode Jonathan Chang and Jason Robertson have a dialogue on the concept of qi in the channels.  Conclusions are difficult but the idea that there is a physiological process (or connectivity/通/tōng) taking place within the anatomical spaces of the acupuncture channels was a foundational concept for Dr. Wang Juyi.  Questions such as "how might think about the effects of acupuncture needles on the local anatomy" and "what kind of concepts did Dr. Wang use to explain qi in the channels" are considered. In any case, a conception of acupuncture without a serious  engagement with these concepts may lead to less effective clinical applications.