Converging evidence for the role of occipital regions in orthographic processing: a case of developmental surface dyslexia

Samuelsson, Stefan

doi:10.1016/s0028-3932(99)00096-2

Cited by 26 publications

(22 citation statements)

References 50 publications

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“…Forced choice homophonic nonword tasks have been successfully used to reveal poor orthographic lexical access in subjects suffering from developmental surface dyslexia (Curtin, Manis, & Seidenberg, 2001;Gayan & Olson, 2003;Manis et al, 1996;Olson, Wise, Convers, Rack, & Fulker, 1989;Samuelsson, 2000). However, all these studies were carried out on languages that are rich in irregular words and homophones.…”

Section: Introductionmentioning

confidence: 99%

Do Italian dyslexic children use the lexical reading route efficiently? An orthographic judgment task

et al. 2008

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The study uses an orthographic judgment task to evaluate the efficiency of the lexical reading route in Italian dyslexic children. It has been suggested that Italian dyslexic children rely prevalently on the sub-word-level routine for reading. However, it is not easy to test the lexical reading route in Italian directly because of the lack of critical items (irregular words), so visual lexical decision tasks and the comprehension/detection of pseudo-homophones are often used. While the former may also be solved on the basis of visual familiarity or phonological re-codification, the latter also involves conceptual and syntactic skills. Eleven dyslexic children participated in the study, performing an orthographic judgment task on stimuli with two phonologically plausible spellings, of which only one was orthographically correct. Their performance was compared with those of 11 proficient readers. The dyslexic children showed selective impairment in detecting phonologically plausible errors, but their performance was normal when required to judge errors inserted in words with regular orthography, i.e., devoid of orthographic ambiguity, and for which a sub-word-level reading procedure is sufficient to guarantee a good performance. Overall, data are coherent with a diagnosis of surface dyslexia, with most children showing defective orthographic lexical processing.

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Section: Introductionmentioning

confidence: 99%

Do Italian dyslexic children use the lexical reading route efficiently? An orthographic judgment task

et al. 2008

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“…These observations suggest that the VWFA is the likely neural substrate of the orthographic lexicon postulated by cognitive models of written language processing (Hillis, 2002;Purcell, Turkeltaub, Eden, & Rapp, 2011;Rapcsak & Beeson, 2004;Rapp, 2002;Sebastian et al, 2014). Consistent with this notion, damage to this region has been associated with a loss of orthographic knowledge as observed in surface alexia and surface agraphia (Friedman & Hadley, 1992;Rapcsak & Beeson, 2004;Samuelsson, 2000;Tsapkini & Rapp, 2010). (A) A cognitive model of written language processing depicting disruption of visual input to the orthographic lexicon (hash marks), an alternate letter-by-letter reading route (dashed lines), and graying of the orthographic lexicon to indicate damage.…”

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confidence: 72%

Treatment for Alexia With Agraphia Following Left Ventral Occipito-Temporal Damage: Strengthening Orthographic Representations Common to Reading and Spelling

Kim

Rising

Rapcsak

et al. 2015

J Speech Lang Hear Res

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Purpose: Damage to left ventral occipito-temporal cortex can give rise to written language impairment characterized by pure alexia/letter-by-letter (LBL) reading, as well as surface alexia and agraphia. The purpose of this study was to examine the therapeutic effects of a combined treatment approach to address concurrent LBL reading with surface alexia/agraphia. Method: Simultaneous treatment to address slow reading and errorful spelling was administered to 3 individuals with reading and spelling impairments after left ventral occipitotemporal damage due to posterior cerebral artery stroke. Single-word reading/spelling accuracy, reading latencies, and text reading were monitored as outcome measures for the combined effects of multiple oral re-reading treatment and interactive spelling treatment. Results: After treatment, participants demonstrated faster and more accurate single-word reading and improved textreading rates. Spelling accuracy also improved, particularly for untrained irregular words, demonstrating generalization of the trained interactive spelling strategy. Conclusion: This case series characterizes concomitant LBL with surface alexia/agraphia and demonstrates a successful treatment approach to address both the reading and spelling impairment.

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“…These results indicate that orthographic word decoding activates extrastriate areas in the left hemisphere. Neuropsychological data provide converging evidence by showing that subjects with left congenital occipital lesions were better at reading and spelling regular words than irregular words, and that they made frequent regularization errors (Samuelsson, 2000;Temple et al, 2001). This clearly demonstrates that extrastriate regions in the left hemisphere play a role in the acquisition of orthographic representations.…”

Section: Differential Neural Substrates For L1 and L2 Processingmentioning

confidence: 85%

Verbal working memory of Korean–English bilinguals: An fMRI study

Kim

Byun

Lee

et al. 2011

Journal of Neurolinguistics

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Converging evidence for the role of occipital regions in orthographic processing: a case of developmental surface dyslexia

Cited by 26 publications

References 50 publications

Do Italian dyslexic children use the lexical reading route efficiently? An orthographic judgment task

Do Italian dyslexic children use the lexical reading route efficiently? An orthographic judgment task

Treatment for Alexia With Agraphia Following Left Ventral Occipito-Temporal Damage: Strengthening Orthographic Representations Common to Reading and Spelling

Verbal working memory of Korean–English bilinguals: An fMRI study

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