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Related Experiment Videos

Attentional networks

M I Posner1, S Dehaene

  • 1Dept of Psychology, University of Oregon, Eugene 97403.

Trends in Neurosciences
|February 1, 1994
PubMed
Summary
This summary is machine-generated.

Attention involves specific brain networks, not just one area or the whole brain. Research shows frontal and parietal lobes regulate attention by amplifying relevant neural activity, aiding cognitive tasks.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Brain Imaging

Background:

  • Attention is a complex cognitive function crucial for processing information.
  • Previous research suggested attention involved widespread or localized brain activity.

Purpose of the Study:

  • To investigate the neural basis of attention using brain-imaging and neurophysiological data.
  • To determine how attentional mechanisms regulate brain activity.

Main Methods:

  • Analysis of recent brain-imaging data (e.g., fMRI, EEG).
  • Neurophysiological recordings to measure brain activity.
  • Examination of attentional effects across different tasks and brain areas.

Main Results:

  • Attention is mediated by specific cortical areas, particularly in the frontal and parietal lobes (anterior and posterior attention systems).

Related Experiment Videos

  • Attentional effects involve amplification of neural activity in relevant processing areas.
  • The precise mechanism (enhancement vs. suppression) varies by task and brain region.

    • Conclusions:

    • Attention is a distributed network function, not localized to a single area.
    • Frontoparietal attention systems play a key role in regulating brain activity for cognitive tasks.
    • Advancements in neuroimaging provide tools for further understanding attentional regulation.