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Neural Determinants of Task Performance during Feature-Based Attention in Human Cortex.

Michael Jigo1,2, Mengyuan Gong1, Taosheng Liu1

  • 1Department of Psychology, Michigan State University, East Lansing, MI 48824.

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|March 3, 2018
PubMed
Summary

Neural activity in frontoparietal areas signals attentional priority. Disrupting the posterior parietal cortex selectively impaired attention, demonstrating its necessity for feature-based attention and guiding behavior.

Keywords:
TMScovert attentionfMRIfrontoparietal cortexmultivariate analysis

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Dorsal frontoparietal networks are linked to attentional priority signals in feature-based attention.
  • Fundamental questions remain regarding how neural activity mediates attentional selection and guides behavior.

Purpose of the Study:

  • To investigate if endogenous fluctuations in attentional priority influence task performance.
  • To determine the necessity of the posterior parietal cortex (PPC) in feature-based attention.

Main Methods:

  • fMRI experiment measuring neural pattern similarity during motion detection tasks (baseline vs. attention).
  • Transcranial magnetic stimulation (TMS) to disrupt PPC function during attention tasks.

Main Results:

  • Higher neural pattern similarity in frontoparietal regions for correct vs. incorrect trials.
  • TMS disruption of PPC selectively impaired performance in the attention task, not the baseline task.

Conclusions:

  • Frontoparietal areas maintain attentional priority signals.
  • The posterior parietal cortex is crucial for successful feature-based attention and behavioral selection.