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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:
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Related Experiment Video

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Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
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Does face-selective cortex show a left visual field bias for centrally-viewed faces?

Matthew T Harrison1, Lars Strother1

  • 1University of Nevada Reno Institute for Neuroscience, Department of Psychology, MS0296 1664 N. Virginia Street Reno, NV, 89557, USA.

Neuropsychologia
|July 15, 2021
PubMed
Summary
This summary is machine-generated.

The left visual field (LVF) advantage in face recognition is explained by right hemisphere superiority and contralateral bias in face-selective cortex. Neural LVF bias in the right fusiform face area (FFA) sufficiently explains this perceptual advantage for upright faces.

Keywords:
Cerebral lateralityContralateral biasFace recognitionLeft visual field advantageRight hemisphere superiorityfMRI

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • The left visual field (LVF) advantage, where the left half of a face is recognized better than the right, is a known phenomenon.
  • This advantage is often attributed to right hemisphere (RH) superiority and contralateral bias in face-selective areas, but this has not been directly tested.

Purpose of the Study:

  • To investigate the neural basis of the LVF advantage in face recognition.
  • To test the assumption of RH superiority and contralateral bias in face-selective cortex.

Main Methods:

  • A behavioral experiment using a chimeric face-matching task to measure the LVF advantage.
  • An fMRI experiment measuring face-selective cortex lateralization and neural contralateral bias using chimeric faces.

Main Results:

  • A significant correlation was found between LVF bias in the fusiform face area (FFA) and the behavioral LVF advantage for upright faces.
  • Right-lateralization of the FFA for changing versus repeated faces also correlated with the behavioral LVF advantage.
  • Regression analyses indicated that both neural LVF bias and FFA lateralization in the right hemisphere contribute independently to the perceptual LVF advantage.

Conclusions:

  • The findings confirm the assumption that RH superiority and contralateral bias in face-selective cortex underlie the LVF advantage in face recognition.
  • Neural LVF bias within the right FFA is sufficient to explain the link between FFA lateralization and the observed perceptual advantage for upright faces.