Sluggish dorsally-driven inhibition of return during orthographic processing in adults with dyslexia

S. Franceschini, S. Mascheretti, S. Bertoni, V. Trezzi, C. Andreola, S. Gori, A. Facoetti

Research output: Contribution to journalArticlepeer-review


Dyslexia (D) is a neurodevelopmental reading disorder characterized by phonological and orthographic deficits. Before phonological decoding, reading requires a specialized orthographic system for parallel letter processing that assigns letter identities to different spatial locations. The magnocellular-dorsal (MD) stream rapidly process the spatial location of visual stimuli controlling visuo-spatial attention. To investigate the visuo-spatial attention efficiency during orthographic processing, inhibition of return (IOR) was measured in adults with and without D in a lexical decision task. IOR is the delay in responding to stimuli displayed in a cued location after a long cue-target interval. Only adults with D did not showed IOR effect during letter-string recognition, despite the typical left-hemisphere specialization for word identification. A specific deficit in coherent-dot-motion perception confirmed an MD-stream disorder in adults with D. Our results suggest that adults with D might develop an efficient visual word form area, but a dorsal-attentional dysfunction impairs their reading fluency.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalBrain and Language
Publication statusPublished - Apr 1 2018


  • Dorsal visual pathway
  • Inhibitory attentional mechanism
  • Learning disabilities
  • Reading disorder
  • Visual processing deficit

ASJC Scopus subject areas

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


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