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A Normalization Framework for Emotional Attention.

Xilin Zhang1, Shruti Japee1, Zaid Safiullah1

  • 1Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland, United States of America.

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|November 22, 2016
PubMed
Summary
This summary is machine-generated.

Emotional valence alters attention fields, influencing performance via response and contrast gain. Negative faces narrow attention (response gain), while positive faces broaden it (contrast gain), involving the dorsolateral prefrontal cortex (DLPFC).

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Attention

Background:

  • The normalization model explains attention's impact on performance through response or contrast gain.
  • Attention field size is a key factor, influencing whether response or contrast gain dominates.

Purpose of the Study:

  • To investigate how emotional valence (negative vs. positive faces) modulates attention fields.
  • To determine if emotional valence affects response gain or contrast gain mechanisms.
  • To explore the neural correlates of emotional valence-dependent attention field modulation.

Main Methods:

  • Spatial cueing task with emotional faces (negative vs. positive) while keeping stimulus size constant.
  • Behavioral measurements of cueing effects to infer response and contrast gain changes.
  • Neuroimaging (fMRI) and effective connectivity analysis to examine brain activity and feedback pathways (DLPFC to V1).

Main Results:

  • Negative faces led to cueing effects consistent with response gain changes, narrowing the attention field.
  • Positive faces resulted in cueing effects suggesting contrast gain changes, broadening the attention field.
  • Neuroimaging confirmed narrowed attention fields for negative faces and broadened fields for positive faces, correlating with self-reported emotional strength and DLPFC-V1 feedback.

Conclusions:

  • Emotional valence significantly modulates attention fields and their underlying gain mechanisms.
  • The dorsolateral prefrontal cortex (DLPFC) plays a critical role in integrating emotional valence into visual attention normalization processes via feedback to V1.