Covert reading of letters in a case of global alexia

Chiara Volpato, Giulia Bencini, Francesca Meneghello, Lamberto Piron, Carlo Semenza

Research output: Contribution to journalArticle

Abstract

This study describes the case of a global alexic patient with a severe reading deficit affecting words, letters and Arabic numbers, following a left posterior lesion. The patient (VA) could not match spoken letters to their graphic form. A preserved ability to recognize shape and canonical orientation of letters indicates intact access to the representation of letters and numbers as visual objects. A relatively preserved ability to match lowercase to uppercase letters suggests partially spared access to abstract letter identities independently of their visual forms. The patient was also unable to match spoken letters and numbers to their visual form, indicating that she could not access the graphemic representations of letters from their phonological representations. This pattern of performance suggests that the link between graphemic and phonological representations is disrupted in this patient. We hypothesize that VA' residual reading abilities are supported by the right hemisphere.

Original languageEnglish
Pages (from-to)217-225
Number of pages9
JournalBrain and Language
Volume120
Issue number3
DOIs
Publication statusPublished - Mar 2012

Keywords

  • Abstract letter identification
  • Global alexia
  • Right hemisphere contribution to word reading

ASJC Scopus subject areas

  • Linguistics and Language
  • Speech and Hearing
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience
  • Language and Linguistics

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