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  • Title: [Role of the parietal associative cortex in "counting" behavior of dogs].
    Author: Varga ME, Pavlova OG, Mats VN.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 2006; 56(6):767-74. PubMed ID: 17285771.
    Abstract:
    Influence of the combined and isolated lesions of areas 5 and 7 of the parietal cortex on the counting behavior was studied in experiments with 6 dogs. Instrumental feeding reaction (lifting and placing the forepaw on the foodwell) was established. The positive conditioned stimulus was a series of 5 clicks with variable interclicks intervals and the negative (non-reinforced) conditioned stimulus was a series of 3 clicks, so that asymmetrical differentiation was elaborated. Combined bilateral lesions of areas 5 and 7 and an isolated lesion of area 5 resulted in a severe impairment of the numerical discrimination for two months, whereas the isolated lesion of area 7 did not lead to any problems in differentiation. The conclusion was made that area 5 is critical for numerical discrimination of sequential stimuli.
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