CONDITIONAL DISCRIMINATION AND TEMPORAL BISECTION IN RATS

  • José Lino Oliveira Bueno
  • Lézio Soares Bueno Júnior

Abstract

In conditional discrimination, an animal do or do not responds during a conditioned stimulusif this stimulus was or was not preceded by a conditional stimulus of another sensorialmodality. The aim of this work was to investigate if two durations (4 or 16 s) of a samemodality stimulus can also acquire the conditional property of modulating rat’s responsesduring a 5 s conditioned stimulus. A 5 s empty interval was included between the conditionaland the conditioned stimuli, so as to evaluate the durations processing by short-term memory.All the rats of the experiment learned the task. Then, the rats were tested in a temporalbisection procedure, presenting conditional stimuli in several intermediate durations between4 and 16 s. We obtained a typical temporal bisection function indicating that duration’srepresentation can modulate rat’s responses even if temporally separated from the responseopportunity.
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