AIMS Neuroscience, 2017, 4(4): 148-168. doi: 10.3934/Neuroscience.2017.4.148 Review article Special Issues

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Neglect Dyslexia in Relation to Unilateral Visuospatial Neglect: A Review

Margaret Jane Moore, Nele Demeyere

Cognitive Neuropsychology Centre, Department of Experimental Psychology, University of Oxford, Oxford OX2 6GG, UK

Received: , Accepted: , Published:

Special Issues: How can domain general theories of categorization account for category-specific deficits found in neuropsychological studies?

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Unilateral visuospatial neglect and neglect dyslexia are neuropsychological syndromes in which patients exhibit consistently lateralised perceptual deficits. However, there is little agreement surrounding whether neglect dyslexia is best understood as a consequence of a domain-general visuospatial neglect impairment or as an independent, content-specific cognitive deficit. Previous case studies have revealed that neglect dyslexia is an exceptionally heterogeneous condition and have strongly suggested that not all neglect dyslexia patient error patterns can be fully explained as a consequence of domain-general visuospatial neglect impairment. Additionally, theoretical models which attempt to explain neglect dyslexia as a consequence of domain-general unilateral visuospatial neglect fail to account for neglect dyslexia errors which occur when reading vertically presented words, lack of neglect errors when reading number strings, and neglect dyslexia which co-occurs with oppositely lateralised domain-general visuospatial neglect. Cumulatively, these shortcomings reveal that neglect dyslexia cannot always be accurately characterised as a side-effect of domain-general visuospatial unilateral neglect deficits. These findings strongly imply that neglect dyslexia may be better understood as a content-specific impairment.

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Copyright Info: © 2017, Nele Demeyere, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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