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Related Experiment Video

Updated: Jul 18, 2025

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Context-dependent attentional spotlight in pulvinar-V1 interaction.

Nihong Chen1, Hailin Ai2, Xincheng Lu2

  • 1Department of Psychology, School of Social Sciences, Tsinghua University, Beijing 100084, People's Republic of China; THU-IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing 100084, People's Republic of China.

Neuroimage
|August 24, 2023
PubMed
Summary

The pulvinar nucleus initiates spatial attention by enhancing brain signal connectivity with V1, particularly in cluttered environments. This process helps prioritize important visual information for focused attention.

Keywords:
AttentionDCMPulvinarRetinotopic connectivityV1fMRI

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Spatial attention acts like a spotlight, boosting processing at attended locations.
  • Understanding the neural mechanisms of attentional selection in cluttered scenes is crucial.

Purpose of the Study:

  • To investigate the pulvinar nucleus and V1 connectivity during focused versus diffused attention.
  • To examine how crowding contexts influence attentional modulation.
  • To determine the directionality of pulvinar-V1 interactions in attention.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed.
  • Researchers analyzed background connectivity between the pulvinar and V1.
  • Participants performed tasks involving focused and diffused attention under varying crowding conditions.

Main Results:

  • Focused attention significantly enhanced correlations between the pulvinar and V1.
  • The pulvinar nucleus initiated this modulation, demonstrating top-down control.
  • The degree of modulation was influenced by the saliency of the visual target.

Conclusions:

  • The pulvinar plays a key role in initiating attentional selection by reweighting information flow to V1.
  • This pulvinar-initiated mechanism is vital for navigating cluttered visual environments.
  • Findings elucidate the neural basis of spatial attention and information prioritization.