[Cerebro-pedal influences on evoked activity in the visceral genglion of the pearl oyster Unio pectorum].
Two types of operation have been made on the nervous system of Unio pectorum: 1) one cerebral ganglion was removed, whereas the remaining ganglion was deprived of all connections except the cerebro-pedal one; 2) both cerebral ganglia were removed. The evoked activity induced by chemical stimulation of the mantle was recorded in the visceral ganglion. After the first type of operation the amplitude of the EP decreases, whereas after the second one increases. Electrical stimulation of the cerebral and pedal ganglia immediately after decerebralization decreases the evoked activity. Stimulation of the pedal ganglion increases the amplitude of the evoked potentials 2--6 days after the removal of both cerebral ganglia. The existence of cerebro-pedal-visceral connection is suggested and neuronal relationships in the system of these connections are discussed.
D000818:Animals; D005071:Evoked Potentials; D005724:Ganglia / Q000502:physiology*; D010125:Ostreidae / Q000502:physiology*
Tserebro-pedal'nye vliianiia na vyzvannuiu aktivnost' v vistseral'nom ganglii perlovitsy Unio pectorum.