HABITUATION AND SENSITIZATION OF COMMAND NEURONS OF UNCONDITIONED AVOIDANCE REFLEX IN SNAIL

  • 1 January 1978
    • journal article
    • research article
    • Vol. 28  (2) , 356-363
Abstract
All investigated neurons were classified into functional groups depending on their participation in an unconditioned avoidance reflex of pneumostome closure. Habituation was produced by tactile stimuli applied with a frequency of 0.1 cycles/s. Spike responses of neurons participating in processing sensory information habituated gradually; reactions of command neurons of avoidance behavior became sensitized to the 2nd or 3rd stimulus of the series. Behavioral reaction was sensitized in parallel with command neurons despite habituation in other types of nerve cells. Behavioral habituation was due to waning of responses in all participating neurons, but the independent process of sensitization is due to sensitization of command neurons. Probable mechanisms of neuronal sensitization were discussed.

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