How does arabic orthographic connectivity modulate brain activity during visual word recognition: An ERP study

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One of the unique features of the Arabic orthography that differentiates it from many other alphabetical ones is the fact that most letters connect obligatorily to each other. Hence, these letters change their forms according to the location in the word (i.e. beginning, middle, or end), leading to the suggestion that connectivity adds a visual load which negatively impacts reading in Arabic. In this study, we investigated the effects of the orthographic connectivity on the time course of early brain electric responses during the visual word recognition. For this purpose, we collected event-related potentials (ERPs) from adult skilled readers while performing a lexical decision task using fully connected (Cw), partially connected and non-connected words (NCw). Reaction times variance was higher and accuracy was lower in NCw compared to Cw words. ERPs analysis revealed significant amplitude and latency differences between Cw and NCw at posterior electrodes during the N170 component which implied the temporo-occipital areas. Our findings show that instead of slowing down reading, orthographic connectivity in Arabic skilled readers seems to impact positively the reading process already during the early stages of word recognition. These results are discussed in relation to previous observations in the literature.

Original languageEnglish
Pages (from-to)292-302
Number of pages11
JournalBrain Topography
Issue number2
StatePublished - Apr 2013

Bibliographical note

Funding Information:
Acknowledgments This research was supported by a post-doctoral fellowship to H. T from the Edmond J. Safra Brain Research Center, and partly by the Israeli National Science Foundation (Grant no’ 623/ 11). We thank Drs Rolando Grave de Peralta Menedez and Sara Gonzales Andino for providing the LAURA inverse solution.


  • Arabic orthography
  • Event-related potentials
  • Lexical decision
  • N170 component
  • Source localization
  • Visual word recognition

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Anatomy


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