The gastroelectrical activity has been recorded with non-polarized Ag- AgCl disc electrodes. Two recording electrodes are placed on the relative corpus ventriculi and pylorus in the abdominal surface of human. The ref- erence electrode is placed on the medial crus. The potentials led from the two recording electrodes are amplified simultaneously by a model Rh-5 Bio- physics amplifier in parallel with 16-20μf filter capacitor at input end and model RJG-3004 recorder. Observations were made on the effect of gastroelectrical activity indu- ced by needling Zusanli points and the relative specificity of different poi- nts in sixty patients treated with acupuncture. The ampitude and frequency of gastroelectrical activity were recorded and analyzed beforeand after 5 minutes the application of acupuncture. The results obtained as follows: 1.The effect of gastroelectical activity was greatest immediately at the onset of acupuncture. The gastric basic electric rhythm was 1.1-4.5 cycle/rain. (average 2.8±0.53 cycle/min.) and the amplit- ude 22

2

86 μv (Average 104.4±63.59μv) before the application of acupuncture 2.There was a doubly modulating action induced by needling points on gastroelectrical activity

sometimes increasing and

sometimes decreasing. The amplitued and frequency were a slightly increased by needling Zusanli

Tianshu points of stomach channel

while the amplitude and frequency were decreased by needling The Zulinqi Points of gall bladder channel. It appears that there is a relative specificity in the action of the points on gastroelectrical activity.