In 48 experiments made on 12 subjects

the effects of head-acupuncture and body-acupuncture on EEG were compared. The results were as follows: The effects of head-acupuncture points or non-points on EEG were similar. Dnring twirling of the needle

the midde to high amplitude of slow waves with phase reversal appeared on the leads near the stimulated place. These slow waves were artifacts produced by twirling of the needle. The effects of body-acupuncture on EEG were the same as head-acupuncture

but there were not the artifacts during twirling of the needle.