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The graphemic buffer and attentional mechanisms.

A E Hillis1, A Caramazza

  • 1HealthSouth Rehabilitation Corporation, Baltimore, MD.

Brain and Language
|February 1, 1989
PubMed
Summary

Two patients with acquired dysgraphia show damage to the graphemic buffer, impacting spelling. Their distinct error patterns offer insights into how spelling information is processed and stored.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Linguistics

Background:

  • Acquired dysgraphia results from brain damage, affecting writing abilities.
  • The graphemic buffer is a theoretical component of the spelling system responsible for holding letter information before output.
  • Understanding selective damage to cognitive systems aids in mapping brain function.

Observation:

  • Two patients with acquired dysgraphia exhibited similar error types in spelling tasks.
  • These patients demonstrated distinct patterns in the location of spelling errors within words.
  • Performance in written and oral spelling tasks supported a hypothesis of selective graphemic buffer damage.

Findings:

  • The observed error patterns align with the hypothesis of selective damage to the graphemic buffer.
  • Differences in error distribution suggest specific mechanisms within the graphemic buffer may be affected.
  • Comparison with previous dysgraphia cases provides a broader understanding of spelling deficits.

Implications:

  • Findings contribute to models of the cognitive architecture of spelling.
  • This research deepens our understanding of the graphemic buffer's role in written language production.
  • Insights may inform therapeutic strategies for individuals with acquired dysgraphia.

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