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Related Experiment Video

Updated: Apr 5, 2026

Assessing Dyslexia at Six Year of Age
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Published on: May 1, 2020

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Acquired spatial dyslexia.

E Siéroff1

  • 1Laboratoire: EA 4468, équipe neuropsychologie du vieillissement, Paris Descartes university, centre Henri-Piéron, institute of psychology, 71, avenue Edouard-Vaillant, 92774, Boulogne-Billancourt cedex, France.

Annals of Physical and Rehabilitation Medicine
|August 15, 2015
PubMed
Summary
This summary is machine-generated.

Spatial dyslexia, a reading disorder after brain lesions, involves attentional deficits. Different lesion locations lead to distinct spatial dyslexia types, impacting left or right visual fields and stimulus selection.

Keywords:
AlexiaAttentionDyslexiaNeuropsychologySpatial neglect

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Ophthalmology

Background:

  • Acquired spatial dyslexia is a reading disorder often resulting from posterior brain lesions.
  • It presents with varied symptoms depending on the lesion's location (left vs. right hemisphere).
  • An attentional framework is crucial for understanding these reading deficits.

Purpose of the Study:

  • To describe various types of spatial dyslexia based on an attentional approach.
  • To elucidate the relationship between brain lesions, spatial neglect, and reading impairments.
  • To propose a model of attention to explain spatial dyslexia.

Main Methods:

  • Analysis of patient cases with left or right posterior brain lesions.
  • Assessment of reading performance, including error patterns in text, words, and non-words.
  • Utilizing tasks involving different visual field presentations and exposure durations.

Main Results:

  • Right posterior lesions cause left neglect dyslexia, linked to left unilateral spatial neglect, affecting left-sided stimuli.
  • Left posterior lesions result in diverse spatial dyslexias, including right neglect dyslexia and attentional dyslexia.
  • Specific deficits like contralesional extinction and stimulus-centred neglect dyslexia were identified.

Conclusions:

  • Spatial dyslexia subtypes are linked to specific lesion locations and attentional network dysfunctions.
  • Disconnections between parietal attentional areas and the visual word form area may underlie some deficits.
  • A comprehensive attentional model is proposed to explain the mechanisms of spatial dyslexia.