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  • Title: [Effects of prefrontal ablations on the reaction of the active choice of feeder under different probability and value of the reinforcement on dog].
    Author: Preobrazhenskaia LA, Ioffe ME, Mats VN.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 2004; 54(3):409-19. PubMed ID: 15326957.
    Abstract:
    The role of the prefrontal cortex was investigated on the reaction of the active choice of the two feeders under changes value and probability reinforcement. The experiments were performed on 2 dogs with prefrontal ablation (g. proreus). Before the lesions the dogs were taught to receive food in two different feeders to conditioned stimuli with equally probable alimentary reinforcement. After ablation in the inter-trial intervals the dogs were running from the one feeder to another. In the answer to conditioned stimuli for many times the dogs choose the same feeder. The disturbance of the behavior after some times completely restored. In the experiments with competition of probability events and values of reinforcement the dogs chose the feeder with low-probability but better quality of reinforcement. In the experiments with equal value but different probability the intact dogs chose the feeder with higher probability. In our experiments the dogs with prefrontal lesions chose the each feeder equiprobably. Thus in condition of free behavior one of different functions of the prefrontal cortex is the reactions choose with more probability of reinforcement.
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