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Objective: To investigate the effects of EA at Zhongwan (RN12)and Weishu (BL21) and to explore its central mechanism.Methods: Forty adult SD rats were randomly divided into the following 5 groups, with 8 rats each: RN12+BL21 group, RN12 group, BL21 group, non-acupoint (NA) group and model (MOD) group.