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research article

Left neglect dyslexia: Perseveration and reading error types

Ronchi, Roberta  
•
Algeri, Lorella
•
Chiapella, Laura
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2016
Neuropsychologia

Right-brain-damaged patients may show a reading disorder termed neglect dyslexia. Patients with left neglect dyslexia omit letters on the left-hand-side (the beginning, when reading left-to-right) part of the letter string, substitute them with other letters, and add letters to the left of the string. The aim of this study was to investigate the pattern of association, if any, between error types in patients with left neglect dyslexia and recurrent perseveration (a productive visuo-motor deficit characterized by addition of marks) in target cancellation. Specifically, we aimed at assessing whether different productive symptoms (relative to the reading and the visuo-motor domains) could be associated in patients with left spatial neglect. Fifty-four right-brain-damaged patients took part in the study: 50 out of the 54 patients showed left spatial neglect, with 27 of them also exhibiting left neglect dyslexia. Neglect dyslexic patients who showed perseveration produced mainly substitution neglect errors in reading. Conversely, omissions were the prevailing reading error pattern in neglect dyslexic patients without perseveration. Addition reading errors were much infrequent. Different functional pathological mechanisms may underlie omission and substitution reading errors committed by right-brain-damaged patients with left neglect dyslexia. One such mechanism, involving the defective stopping of inappropriate responses, may contribute to both recurrent perseveration in target cancellation, and substitution errors in reading. Productive pathological phenomena, together with deficits of spatial attention to events taking place on the left-hand-side of space, shape the manifestations of neglect dyslexia, and, more generally, of spatial neglect. (C) 2016 Elsevier Ltd. All rights reserved.

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Type
research article
DOI
10.1016/j.neuropsychologia.2016.07.023
Web of Science ID

WOS:000383003100043

Author(s)
Ronchi, Roberta  
•
Algeri, Lorella
•
Chiapella, Laura
•
Gallucci, Marcello
•
Spada, Maria Simonetta
•
Vallar, Giuseppe
Date Issued

2016

Publisher

Elsevier

Published in
Neuropsychologia
Volume

89

Start page

453

End page

464

Subjects

Right-brain-damaged patients

•

Left unilateral spatial neglect

•

Recurrent perseveration

•

Neglect dyslexia

•

Omission and substitution reading errors

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LNCO  
Available on Infoscience
October 18, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/130392
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