Assessing the Effects of Acupuncture by Comparing Needling the Hegu Acupoint and Needling Nearby Nonacupoints by Spectral Analysis of Microcirculatory Laser Doppler Signals

Figure 2

Experimental setup. For the LDF signal, each data point represents the value averaged over a 1-min epoch. At the Hegu acupoint, the MBF increased prominently during the early effect, and then tended to return to the baseline value during the later effect.