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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
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Parallel Processing01:20

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The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Visual System01:26

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Association Areas of the Cortex01:21

Association Areas of the Cortex

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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Vision01:24

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Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology
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Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Published on: June 29, 2021

Pre-orthographic character string processing and parietal cortex: a role for visual attention in reading?

Muriel Lobier1, Carole Peyrin, Jean-François Le Bas

  • 1Laboratoire de Psychologie et NeuroCognition (UMR 5105 CNRS), Université Pierre-Mendès-France, BP 47, 38040 Grenoble Cedex 9, France. muriel.lobier@gmail.com

Neuropsychologia
|June 5, 2012
PubMed
Summary

This study reveals that the parietal cortex is crucial for pre-orthographic processing, handling character strings regardless of type. This finding highlights the brain

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Visual Perception

Background:

  • Orthographic processing, crucial for reading, is linked to the left ventral occipito-temporal cortex.
  • Pre-orthographic processing, which handles character strings irrespective of type, remains less understood.
  • Existing research suggests the superior parietal lobule's involvement in processing multiple letters.

Purpose of the Study:

  • To pinpoint the neural mechanisms underlying pre-orthographic character string processing.
  • To investigate this processing independently of character type (alphanumeric vs. non-alphanumeric).
  • To clarify the role of the parietal cortex in processing visual character strings.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed with 14 skilled adult readers.
  • Participants performed visual categorization tasks involving single and multiple elements of alphanumeric (AN) and non-alphanumeric (nAN) characters.
  • A priori defined anatomical regions of interest (ROIs) in the parietal cortex were analyzed.

Main Results:

  • The posterior parietal cortex showed significantly greater activation for multiple-element processing compared to single-element processing.
  • Bilateral superior parietal lobule (SPL/BA7) exhibited enhanced activation for multiple versus single elements, irrespective of character type.
  • No specific multiple-element processing activity was detected in the inferior parietal lobules.

Conclusions:

  • Parietal cortex mechanisms are integral to pre-orthographic character string processing.
  • These findings suggest attentional mechanisms within the parietal cortex play a role in the early stages of visual word analysis.
  • The study extends the known functions of the superior parietal lobule to include general character string processing.