| The purpose of this study is to investigate the effect of acupuncture andtranscutaneous electrical acupoint stimulation (TEAS) by nonlinear dynamicanalysis method. After comparing the levels of the complexity of brain pre-andpost-stimulation, we find that TEAS at the Zusanli acupoint can almost give thesame effect as acupuncture in increasing the levels of the complexity of brain on thecorresponding area. And because of its non-invasiveness and painlessness, TEASprovides us a good alternative method to acupuncture for health care.A brief introduction to acupuncture and Zusanli (ST36) is given at thebeginning of the thesis. With a view to the characteristic of acupuncture and thenonlinearity of the brain, approximate entropy (ApEn) and CO complexity are chosefor the electroencephalograph (EEG) analysis.Six healthy volunteers were included in the TEAS experiment. Electricalstimulation was given on the skin surface of Zusanli (St36) 20 min per day lastingfor 9 days, while EEG signals were collected in the 1st, 3rd, 5th, 7th and 9th day.Acupuncture EEG data was collected in a way similar to TEAS. The result indicatesthat, on the channels, which are mapped to the motor area, somatic sensory areaⅡand supplementary motor area, significant (p＜0.05) changes can be found for bothacupuncture and TEAS. However, on the other channels, only acupuncture took itseffect. On the other hand, acupuncture also shows its stronger effect on the effectivetime and the difference between pre-and post-stimulation. At last, the adaptabilityin the 9th day for most subjects suggests that one period may be not enough for thetreatment, which has good consistence with the traditional Chinese medicine.
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