Bloodletting, of course, was a major aim of early vessel therapy and is frequently described in the Su wen.1
Paul U Unschuld
“Cargo cult” is a metaphor that describes the act of imitating an activity or a practice without any insight into the underlying principles. In the literal sense, it refers to a magico-religious practice observed in tribal societies, where the members ritually imitate the activities of a technologically-advanced society they had contact with, so that they can magically draw their material wealth. For instance, after WWII, indigenous tribes in New Guinea who had come in close contact with cargo planes, started to build landing strips and populated them with plane-like effigies that were made of straw, bamboo, and coconuts, so that they can magically lure the passing planes.2 The term “cargo cult science” was introduced by Richard Feynman in a speech at Caltech in 1974 to describe pseudoscientific studies in which all the superficial aspects of a scientific inquiry are adhered to, but the underlying principles are not scientific. He classified many educational and psychological studies as such, for having the appearance of academic research but lacking the principles of a scientific inquiry.3
Another example of cargo cult science is the plethora of two-arm acupuncture studies that compare a needling regimen using the traditional concepts, and compare it with a non-interventional placebo. These studies might have the appearance of clinical research, but they are inherently flawed and inconclusive, because they do not rule out the possibility that the observed results are mainly due to the painful stimulus and injury caused by a needle, which can occur regardless of the insertion point. Indeed, an acute noxious stimulus from a prickle, heat, or any other painful stimulus – almost anywhere on the skin – can attenuate the perception of pain in another area of the body through a reflex called “counter-irritation,” also called the “pain-inhibiting-pain effect” or “diffuse noxious inhibitory control” (DNIC).4 DNIC was extensively studied by Fauve et al. in the 1980s, who showed in mice that it has an effect equivalent or superior to that of glucocorticoids.5,6
Acupuncture postulates that specific needling into specific areas has curative properties. But there is lots of data that non-specific needling can accomplish the same things. The body reacts to noxious stimuli by reducing the pain response.
Thus there may well not be anything about acupuncture as a specific therapy that is not already explained by evidence-based medical approaches.
So, doing acupuncture trials without controlling for these known effects results in trials that tell us little new. Seems pretty typical for alternative medicine.