Selective Reading Slowness in a Traumatic Patient with Impairment in Basic Visual Processes

Enrico Di Pace, Cecilia Guariglia, Anna Judica, Donatella Spinelli, Pierluigi Zoccolotti

Research output: Contribution to journalArticle

Abstract

Following a closed-head injury, G.M., a 17-year-old male, showed a reading disturbance in the absence of other cognitive deficits. G.M.'s reading was exceedingly slow, although virtually error free. Analysis of his disorder indicated an inability to read words presented tachistoscopically to the left (spared) visual field. Therefore the reading deficit cannot be interpreted as simply due to the visual field reduction (hemianopic alexia). Reading speed was clearly affected by word length, a finding typical of letter-by-letter reading. Both behavioral and psychophysical testing indicated a selective reduction of visual discrimination and detection (particularly in the range of high spatial frequency information) in portions of the left hemifield which appeared spared upon perimetric examination. Overall, it is suggested that the reading deficit, phenomenologically similar to that of other letter-by-letter readers, can be interpreted as due to a combination of basic visual perturbations: visual field cut with macular splitting and deficit of processing of high spatial frequency information.

Original languageEnglish
Pages (from-to)878-899
Number of pages22
JournalJournal of Clinical and Experimental Neuropsychology
Volume17
Issue number6
DOIs
Publication statusPublished - Dec 1 1995

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ASJC Scopus subject areas

  • Clinical Neurology
  • Clinical Psychology
  • Neurology
  • Psychology(all)

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