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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Behavioral Neuroscience

Background:

  • Adaptive behavior relies on rapidly assessing environmental changes.
  • The orbitofrontal cortex (OFC) is implicated in assigning motivational significance to stimuli.
  • The OFC's role in prioritizing attention to unexpected, unattended stimuli is not fully understood.

Purpose of the Study:

  • To investigate the functional connectivity of the right posterior orbitofrontal cortex (pOFC).
  • To understand how the pOFC contributes to attentional selection during unexpected environmental changes.
  • To explore the neural mechanisms underlying adaptive behavioral adjustments.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed.
  • Psychophysiological interaction (PPI) analysis was used to assess functional connectivity.
  • Participants adjusted goal-directed behavior to unattended, relevant events.

Main Results:

  • Increased functional interaction between pOFC and attention/salience networks (pulvinar, inferior parietal lobule, substantia nigra) was observed for unattended, significant changes.
  • A positive correlation between accuracy and pOFC connectivity with extrastriate cortex suggests enhanced visual processing of relevant unattended stimuli.
  • Evidence supports a role for pOFC in motivationally-driven attentional control.

Conclusions:

  • The interplay between pOFC and other brain regions facilitates rapid voluntary control of attention.
  • This mechanism allows organisms to effectively manage attentional resources for behaviorally significant, unexpected events.
  • The findings elucidate how the brain prioritizes and processes critical information outside the current focus of attention.