Neural Acupuncture Unit: A New Concept for Interpreting Effects and Mechanisms of Acupuncture

"The traditionally defined acupoints could be defined as an anatomical landmark system that indicates local sites where NAUs may contain relatively dense and concentrated neural and neuroactive components, upon which acupuncture stimulation would elicit a more efficiently physiological and therapeutic response compared to non-acupoints."

http://www.hindawi.com/journals/ecam/2012/429412/