[Electrical activity of the cerebral ganglion of the mollusk Helix vulgaris upon acoustic stimulation of the statocyst].

Responses in the cerebral ganglia to acoustical stimulation were studied at the frequencies 30, 60, 150, 300, 500, 1000 Hz. The lowest threshold of response was at the frequency 30 Hz 60 dB spl. The reaction was in the form of evoked response or different patterns of spike activity. Responses could take place at one frequency of stimulation or in the wide range of frequencies. The reaction lasted sometimes even after the stimulation had ceased. After 3-4 stimulations by one frequency the reaction disappeared as a rule. But if the stimulation continued, but with another frequency, the response restored. The acoustic stimulation of the statocyst evokes various types of response in the cerebral ganglia.