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Related Experiment Videos

The frontal cortex and exogenous attentional orienting.

Janice J Snyder1, Anjan Chatterjee

  • 1Psychology Department, University of British Columbia Okanagan, Canada. janice.snyder@ubc.ca

Journal of Cognitive Neuroscience
|October 31, 2006
PubMed
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Damage to the dorsolateral prefrontal cortex impairs attention orienting. Specifically, frontal lobe lesions disrupt the ability to disengage attention from stimuli, affecting behavioral responses.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurobiology

Background:

  • Effective behavior relies on the attentional orienting system, balancing goal-directed and stimulus-driven processes.
  • Neural mechanisms of stimulus-driven (exogenous) orienting are less understood than goal-directed (endogenous) orienting.

Purpose of the Study:

  • Investigate the neural basis of exogenous orienting.
  • Examine effects of frontal and parietal lesions on exogenous cueing.

Main Methods:

  • Assessed early facilitation and late inhibition of return (IOR) effects from exogenous cues.
  • Studied patients with unilateral frontoparietal lesions, focusing on dorsolateral prefrontal cortex (DLPFC) damage.

Main Results:

Related Experiment Videos

  • Unilateral frontoparietal damage did not impact early exogenous cue facilitation.
  • DLPFC lesions, particularly in the inferior frontal gyrus, caused an exogenous disengage deficit.
  • Some DLPFC lesions (middle frontal gyrus) led to prolonged reorienting deficits beyond typical reflexive orienting durations.

    • Conclusions:

    • The dorsolateral prefrontal cortex is crucial for exogenous attention orienting.
    • Specific components of exogenous orienting can be selectively impaired by damage to distinct DLPFC subregions.