Psychological placebo effect of implied premise that the patient conscious and able to analyze and judge the response to external stimuli and to make sense of. Acupuncture can treat and coma, after shock, anesthesia delayed awakening, consciousness and other vegetative patients disappeared or very vague state, it is sufficient to explain acupuncture is not just psychological suggestio... http://www.acupuncture123.ca/Placebo%20En1.html