A review paper by Chinese authors has focused on the neurophysiological basis of the effects of Neiguan P-6 stimulation on cardiovascular mechanisms. The review summarises experimental studies, which show that specific brain regions and neural pathways are involved in attenuating sympathoexcitatory cardiovascular reflex responses, following acupuncture. (The influence of PC6 on cardiovascular disorders: a review of central neural mechanisms. Acupunct Med. 2012 Mar;30(1):47-50).