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Neuronal pathways and mechanisms underlying the effect of acupuncture for different brain nuclei in blood pressure (BP) regulation. Black arrows, →, indicate inhibition effect from ARC, vIPAG, NRP; red arrows, 
, indicate activation effect from ARC, blue arrows, 
indicate efferent projections from different brain nuclei to heart, blood vessels and kidney; orange arrows, 
, indicate afferent input from P 5–6 acupoints.
