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Monocular channels have a functional role in endogenous orienting.

William Saban1, Liora Sekely1, Raymond M Klein2

  • 1Department of Psychology and the Institute of Information Processing and Decision Making (IIPDM), University of Haifa, Israel.

Neuropsychologia
|January 11, 2018
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Summary

Lower visual pathways contribute to endogenous orienting of attention. Findings suggest a dynamic interaction between higher and lower neural levels, challenging exclusive reliance on higher cortical structures for attention.

Keywords:
CortexEndogenous attentionMonocular regionsOrientingSubcortical regions

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • Traditionally, higher cortical structures are recognized for endogenous orienting.
  • Evolutionary perspectives and prior data suggest a potential role for lower visual pathways.

Purpose of the Study:

  • To investigate the functional contribution of lower monocular channels in endogenous orienting of attention.
  • To explore if visual stream processing at lower neural levels influences attentional mechanisms.

Main Methods:

  • Employed sensitive behavioral manipulation in a cue-target detection task.
  • Presented spatially informative cues and targets to the same or different eyes at varied intervals.

Main Results:

  • Endogenous orienting onset was significantly earlier when cues and targets were presented to the same eye.
  • Demonstrated that monocularly segregated regions modulate endogenous attentional facilitation.

Conclusions:

  • Endogenous facilitation is influenced by monocular processing within the visual stream.
  • Suggests that endogenous orienting involves a dynamic interplay between higher cortical and lower neural mechanisms.