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The anterior cingulate cortex mediates processing selection in the Stroop attentional conflict paradigm.

J V Pardo1, P J Pardo, K W Janer

  • 1Department of Psychiatry, Washington University, Saint Louis, MO 63110.

Proceedings of the National Academy of Sciences of the United States of America
|January 1, 1990
PubMed
Summary

The anterior cingulate cortex is key for resolving cognitive conflict during the Stroop task. This brain region, along with a distributed network, manages attention and task demands, showing complex processing beyond simple interference.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Medical Imaging

Background:

  • Regional cerebral blood flow (rCBF) measures local neuronal activity.
  • The Stroop color/word task assesses cognitive interference and attention.

Purpose of the Study:

  • To investigate brain activity during the Stroop task using positron emission tomography (PET).
  • To identify brain regions involved in resolving the conflict between word reading and color naming.

Main Methods:

  • Positron emission tomography (PET) was used to measure regional cerebral blood flow.
  • Eight healthy right-handed subjects performed congruent and incongruent Stroop color/word tasks.

Main Results:

  • The anterior cingulate cortex showed the most significant activation.

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  • Other activated areas included the premotor cortex, postcentral cortex, putamen, supplementary motor area, superior temporal gyrus, and peristriate cortices.

    • Conclusions:

    • The anterior cingulate cortex plays a crucial role in attentional processing and task-relevant processing center recruitment.
    • The Stroop interference effect involves a widespread neural network, not just simple stimulus or response interference.