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Horizontal and vertical neglect dyslexia

P Nichelli1, A Venneri, R Pentore

  • 1Clinica Neurologica, Università di Modena, Italy.

Brain and Language
|April 1, 1993
PubMed
Summary
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This study details a patient with neglect dyslexia, a reading disorder affecting word processing. The patient exhibited unique vertical and horizontal reading errors, impacting letter shape perception.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Ophthalmology

Background:

  • Case study of a 25-year-old male (G.G.) with right temporal, occipital, and basal forebrain lesions.
  • Patient presented with a visual field defect predominantly in the upper left quadrant.

Observation:

  • G.G. displayed significant left horizontal and lower vertical neglect dyslexia.
  • The severity of neglect dyslexia was disproportionately greater than general visuo-spatial neglect.

Findings:

  • This is the first reported case of neglect dyslexia influenced by stimulus orientation.
  • Errors occurred in the final letters of top-down presented words and initial letters of bottom-up presented words.

Implications:

  • Suggests neglect dyslexia can disrupt the internal letter shape map along both horizontal and vertical axes.

Related Experiment Videos

  • Highlights the complex nature of visual processing and reading disorders after brain injury.