| Abstract: | Rhythmic stimulation of the dorsal hippocampus causes a long-lasting (2–6 sec) depression of both the fast and the electrotonic dorsal root potentials. The depression depends on the intensity of the stimulation of the hippocampus and on the time interval between the stimulation of the hippocampus and the nerve. The sortest time interval producing the depression was within 15–20 msec. The action of afferent impulsation is depressed during both the ipsilateral and contralateral stimulation of the hippocampus. The stimulation of the fornix also exerts a depressing influence on the dorsal root potentials; however, it is not so prolonged as the stimulation of the hippocampus (500–600 msec).A. A. Bogomolets Institute of Physiology, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Neirofiziologiya, Vol. 1, No. 2, pp. 186–193, September–October, 1969. |
