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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Feature-Selective Attentional Modulations in Human Frontoparietal Cortex.

Edward F Ester1, David W Sutterer2, John T Serences3

  • 1Department of Psychology, University of Oregon, Eugene, Oregon 97403, Department of Psychology and eester@ucsd.edu.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|August 5, 2016
PubMed
Summary
This summary is machine-generated.

Visual attention control is not strictly divided between "source" and "site" areas. Simple feature representations, like orientation, are found across many brain regions, including visual, parietal, and frontal cortices, and are modulated by attention.

Keywords:
frontoparietal cortexfunctional neuroimagingvisual attentionvisual cortex

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Visual Attention

Background:

  • Traditional models of visual attention distinguish between top-down control (frontoparietal areas) and bottom-up sensory processing (posterior visual areas).
  • Frontoparietal areas are thought to encode abstract task variables, while visual areas encode continuous feature information.
  • This dichotomy influences our understanding of how the brain selects and processes visual information.

Purpose of the Study:

  • To challenge the strict segregation of attentional control based on representational properties.
  • To investigate the neural basis of visual feature representation across the human cortex during attention.
  • To determine if simple feature values are encoded in areas traditionally associated with top-down control.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed to study brain activity.
  • A roving searchlight analysis and an inverted encoding model were used to examine neural representations.
  • Participants attended to either the orientation or luminance of peripheral visual stimuli.

Main Results:

  • Orientation-selective representations were identified in widespread cortical areas, including visual, parietal, and prefrontal regions.
  • These representations were found in areas such as the medial occipital cortex, lateral parietal cortex, and superior precentral sulcus.
  • Attending to orientation, compared to luminance, enhanced these orientation-selective representations in many, but not all, studied regions.

Conclusions:

  • Findings challenge models positing a strict separation between attentional control sources and sensory processing sites.
  • Simple feature values are encoded across a broad range of cortical areas, spanning the visual processing hierarchy.
  • Attention modulates these representations in multiple brain regions, suggesting a more integrated system for visual selection.