| Abstract: | Considerable membrane depolarization was shown to arise periodically, at intervals of up to a few minutes, in the PPa1 bursting neuron ofHelix pomatia. Pulses of slow depolarizing current were found by the voltage clamping method. The frequency of the pulses was independent of the holding potential. The equilibrium potential for the slow depolarizing current was about 45 mV. During development of the depolarizing current a region of negative conductivity was observed on the steady-state voltage-current characteristic curve of the membrane. It is suggested that the pulses of slow depolarizing current are associated with the presence of secretory connections between the molluscan neurons.A. A. Bogomolets Institute of Physiology, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Neirofiziologiya, Vol. 9, No. 6, pp. 606–612, November–December, 1977. |
