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Cortical Competitive Processing Produces Interference in Color-Word Tests

  • Kiyohiko Nakamura
Conference paper

Abstract

A hypothesis that cortical processing of the millisecond time range is performed with a competitive mechanism is tested with a neural network model of the Stroop interference. The model cortex is assumed to consist of columns which include populations of pyramidal cells and inhibitory interneurons. They are given by a Hodgkin-Huxley type of model neurons. Model analysis shows first the cortical circuitry performs temporal competition that lateral inhibition between the columns restricts firing to the first activated columns by suppressing the others before firing. Second, assuming the fasciculus arcuatus is stronger than the projections from the color-processing pathways of temporal cortex, incongruent word and color stimuli for the color-naming task compete to activate the columns of the Broca cortex. This delays vocal response to the color stimuli for several milliseconds. Third, in the reading task, incongruent color stimuli hardly activate the columns because the projections from the color-processing pathways are not strong. No interference is produced in reading. These are in good accordance with psychophysical data and therefore support the present hypothesis.

Keywords

Lateral Inhibition Inhibitory Interneuron Color Stimulus Vocal Response Stroop Interference 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    Salmelin, R., Hari, R., Lounasmaa, O. V., Sams, M., “Dynamics of brain activation during picture naming” Nature, Vol. 368, 1994, pp. 463–465.ADSCrossRefGoogle Scholar
  2. [2]
    Nakamura, K., “A theory of cerebral learning regulated by the reward system I. hypotheses and mathematical description,” Biological Cybernetics, Vol. 68, 1993, pp. 491–498.MATHCrossRefGoogle Scholar
  3. [3]
    Nakamura, K., “Temporal competition as an optimal parallel processing of the cerebrohypothalamic system,” Proceedings of IEEE International Conference on Neural Networks, Vol. 1, 1993, pp. 64–69.CrossRefGoogle Scholar
  4. [4]
    Stroop, J. R., “Studies of interference in serial verbal reactions,” Journal of Experimental Psychology, Vol. 18, 1935, pp. 643–662.CrossRefGoogle Scholar
  5. [5]
    Dyer, F. N., “The Stroop phenomenon and its use in the study of perceptual, cognitive, and response processes,” Memory & Cognition, Vol. 1, 1973, pp. 106–120.CrossRefGoogle Scholar
  6. [6]
    Klein, G. S., “Semantic power measured through the interference of words with color-naming,” American Journal of Psychology, Vol. 77, 1964, pp. 576–588.CrossRefGoogle Scholar
  7. [7]
    Gray, C. M., Singer, W., “Stimulus-specific neuronal oscillations in orientation columns of cat visual cortex,” Proceedings of National Academy of Science U.S.A., Vol. 86, 1989, pp. 1698–1702.ADSCrossRefGoogle Scholar
  8. [8]
    Nakamura, K., Mikami, A., Kubota, K., “Oscillatory neuronal activity related to visual short-term memory in monkey temporal pole,” NeuroReport, Vol. 3, 1992, pp. 117–120.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Kiyohiko Nakamura
    • 1
  1. 1.Graduate School of Information SystemsUniversity of Electro-CommunicationsTokyoJapan

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