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Simultaneous selection by object-based attention in visual and frontal cortex.

Arezoo Pooresmaeili1, Jasper Poort, Pieter R Roelfsema

  • 1The Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, 1105 BA, Amsterdam, The Netherlands.

Proceedings of the National Academy of Sciences of the United States of America
|April 9, 2014
PubMed
Summary
This summary is machine-generated.

Visual attention involves reciprocal interactions between frontal eye fields (FEF) and primary visual cortex (V1). FEF integrates signals from V1, influencing attentional selection and potentially correcting errors in visual processing.

Keywords:
contour groupingerror trialsnoise correlation

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Visual Attention

Background:

  • Current models propose top-down control of visual processing by frontal cortex.
  • The active role of visual cortex in attentional selection remains unclear.

Purpose of the Study:

  • To investigate whether visual cortex actively participates in attentional selection.
  • To explore the interplay between frontal eye fields (FEF) and primary visual cortex (V1) during object-based attention.

Main Methods:

  • Simultaneous neuronal recordings in FEF and V1 during an object-based curve-tracing task.
  • Analysis of attentional selection latencies, signal amplitudes, and interareal correlations.

Main Results:

  • Accurate performance showed similar attentional selection latencies in FEF and V1, increasing with task difficulty.
  • V1 attentional signals saturated early, while FEF signals integrated over time, suggesting FEF integrates V1 signals.
  • In erroneous trials, FEF made earlier selections than V1, indicating FEF imposed decisions on V1.

Conclusions:

  • Selective attention involves reciprocal interactions between V1 and FEF.
  • FEF appears to integrate attentional signals from V1 and can influence V1's processing, even leading to errors.