The functions of LHRC along meridians. (a) A higher thermal line along stomach meridian was shown (↑) by thermal infrared imager after injecting hot water into Zusanli (+). (b) A zone of high blood perfusion appeared 30 min after injecting histamine into LHRC. (c) The migration of 18F-FDG along lung meridian and heart meridian (upper four figures) and along bladder meridian (low four figures). ↑ indicates a branch of 8F-FDG along bladder meridian separated centripetally at the middle of thigh. The figures on the right show the postures of the subjects. The red points are the injecting points. The rightmost line chart shows the branch of bladder meridian on thigh.