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Related Experiment Videos

Neural evidence for representation-specific response selection.

Eric H Schumacher1, Puni A Elston, Mark D'Esposito

  • 1Department of Psychology, University of California, Berkeley 94720-1650, USA. eschu@socrates.berkeley.edu

Journal of Cognitive Neuroscience
|January 8, 2004
PubMed
Summary

Response selection is not a single process but stimulus-specific, involving distinct brain networks for spatial versus nonspatial information. This finding challenges unitary models of cognitive control.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Brain Imaging

Background:

  • Cognitive theories often propose a unitary response selection mechanism.
  • Neuroscience suggests localized neural processing based on information type.

Purpose of the Study:

  • To investigate if response selection is unitary or stimulus-specific.
  • To identify distinct neural networks for spatial and nonspatial response selection.

Main Methods:

  • Two functional magnetic resonance imaging (fMRI) experiments were conducted.
  • Response selection difficulty was manipulated using spatial and nonspatial stimuli.
  • The same participants underwent both experiments.

Main Results:

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  • Spatial response selection activated right prefrontal, bilateral premotor, and dorsal parietal regions.
  • Nonspatial response selection involved left prefrontal cortex and ventral posterior regions.
  • Distinct brain networks were identified for processing different stimulus types.

    • Conclusions:

    • Response selection is stimulus-specific, not unitary.
    • Different neural networks mediate response selection based on stimulus type.
    • This supports a more flexible and adaptive model of cognitive processing.