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Related Experiment Video

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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Spatial sampling in human visual cortex is modulated by both spatial and feature-based attention.

Daniel Marten van Es1, Jan Theeuwes1, Tomas Knapen1,2

  • 1Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.

Elife
|December 12, 2018
PubMed
Summary
This summary is machine-generated.

Spatial attention and feature-based attention interact to shape visual sampling. The brain optimizes visual sampling based on both location and feature, adapting to specific neural properties.

Keywords:
attentionfMRIfeature-based attentionhumanneurosciencepopulation receptive fieldsspatial attentionvision

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Spatial attention alters visual space sampling.
  • Feature-based attention is hypothesized to modulate this resampling for attended features.

Purpose of the Study:

  • Investigate the interaction between spatial and feature-based attention on visual sampling.
  • Determine if feature-based attention optimizes sampling based on feature type (color vs. temporal frequency).

Main Methods:

  • Estimated spatial sampling in visual cortex using fMRI.
  • Independently manipulated spatial attention (location) and feature-based attention (feature type).

Main Results:

  • Spatial and feature-based attention showed a significant interaction.
  • Visual space resampling depended on both attended location and feature.
  • This interaction was consistent across visual cortex areas but modulated by voxel feature-selectivity.
  • Findings support an attentional gain field model.

Conclusions:

  • Spatial attention deployment is tailored to the spatial sampling properties of feature-selective neural populations.
  • Visual attention dynamically adjusts spatial sampling based on both location and feature content.