A method for leading off action currents from human salivary gland and for recording velocity of secretion.

(Received for publication, June 30, 1949) Since Bayliss and Bradford reported the electrical phenomena accom panied with secretory activity of animal salivary glands, a number of in vestigations have been made on this subject. A review is given in Har reveld's communication.1) As to the function of the human salivary gland, no investigation on action currents has appeared, because there is no method available for leading off action currents developed in this organ. On Motokawa's suggestion to pick up potential changes from the human parotid gland with the aid of a Krasnogorski's suction capsule and a sensitive galvanometer, we worked out the following method and evaluat ed its usefulness for investigation of the secretory activity of the human salivary gland. In the present communication the method and apparatus will be described in detail with some critical comments.