The Acquisition And Analysis Of Electroencephalogram When Acupuncture

Acupuncture works as well as standard drugs, whereas its mechanism is still unknown. Many scientists have worked on the physiological basis of Chinese medicine and attempt to explain the acupuncture points and meridians using modern scientific technology.The paper has realized a kind of architecture of the Data Acquisition System (DAQ) which has high sampling frequency of 64KHz at the most, 256 electrodes, and is able to acquire various body-surface electrical signals with full synchronization mode.The electroencephalographic (EEG) can be regarded as a reflection of the activity of ensembles of generators producing oscillations in several frequency ranges, which is a complex physiological electrical activity. The paper analyzed the three influencing factors on acupuncture experiment with EEG before and designed a new one. In our experiments, we applied manual acupuncture; selected acupoint distributed over distal end of leg and chose the experimental subjects with acupuncture experience.The value of SEF90 and relative power in delta band of the EEG signals significantly was changed in the frontal lobe, temporal lobe and posterior temporal lobe during acupuncture at ST-36. It concluded that acupuncture at ST-36 has a remarkable effect on the brain and exert a sedation effect which coincides with the basic theory of traditional Chinese medicine. The method of LZ complexity and wavelet energy entropy was also used to analyze the EEG signals and discovered an remarkable effect on the brain during acupuncture.The paper used coherence estimation method and synchronization likelihood method to measure the synchronization of different brain areas during acupuncture and found that the synchronization of different brain areas inδandγbands were enhanced when applied acupuncture. We believe it's an exhibit that the electrical activity of different region in brain is coordinated by acupuncture. In order to study the acupuncture effect, the paper introduced the concept of brain functional network into the research and found that acupuncture could increase the number of long distance connection between different brain areas. We think acupuncture has the effect that coordinates the electrical activity of different regions in the brain and strengthen the information exchange of far-end regions of the brain. We also found that acupuncture can enhance the small world feature of brain functional network, which means acupuncture can make brain functional networks have more perfect distributed information processing network architecture and a higher resilience to random error.The paper used several modern signal proccess methods to analyze the EEG signals during acupuncture and found acupuncture on ST-36 has a remarkable effect on the brain. In this paper, we first introduced the concept of synchronization and brain functional network into the acupuncture research and provided new ideas and methods to the research of traditional Chinese acupuncture theory.