49 , 50 For instance, the effects of acupuncture at Leg Three Li (足三里 zù sān lǐ, ST-36) and Sunken Valley (陷谷 xiàn gǔ, ST-43), two adjacent acupoints on the stomach meridian, are reflected in similar harmonic patterns characterized by a decreasing trend in P5, the phase angle of the fifth harmonic (one of the harmonic properties mentioned above). 46 , 47 The fifth harmonic is believed to correspond to the stomach meridian, aligning with observations in pulse harmonic analysis studies, as demonstrated in Table 1 .
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Peripheral pulse harmonic analysis and its clinical application: A systematic review.
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