Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/66653
Title: Neural correlates of spelling difficulties in Alzheimer`s disease
Author: Rodríguez-Ferreiro, Javier
Martínez, C
Pérez-Carbajal, A. J.
Cuetos Vega, Fernando
Keywords: Malaltia d'Alzheimer
Disortografia
Comunicació escrita
Alzheimer's disease
Spelling disability
Written communication
Issue Date: 2014
Publisher: Elsevier Ltd
Abstract: Alzheimer's disease (AD) is associated with a general cognitive decline that affects the memory and language domains. Thus, an oral production deficit with a lexical-semantic origin has been widely observed in these patients. Their written production capacities, however, have been much less studied. We assessed the spelling abilities of 22 AD patients and a group of matched healthy controls with a test battery including written picture naming and word and pseudoword dictation tests, as well as text dictation and spontaneous writing tasks. The results of the AD patients in the discriminative tasks were then entered into voxel-based morphometry analyses along with their grey matter volumes. The patient group presented a selective impairment for word dictation, which contrasted with a spared capacity to spell pseudowords, and showed more difficulties for words with arbitrary and rule-based orthography. Moreover, they also produced less complete syntactic units in the spontaneous writing task. These results point out the lexical-semantic, as opposed to sublexical, nature of the spelling deficit associated to AD. In addition, we recognized a mainly left-lateralized cortical network, including areas in the posterior inferior temporal lobe and the superior region of the parietal cortex, which might be responsible for this impairment. Other regions, such as the putamen, were also associated to the deficit. The results of this study, hence, improve our understanding of the neuropsychological and neuroanatomical mechanisms that underlie the cognitive symptoms associated to AD.
Note: Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.neuropsychologia.2014.10.006
It is part of: Neuropsychologia, 2014, vol. 65, p. 12-17
Related resource: http://dx.doi.org/10.1016/j.neuropsychologia.2014.10.006
URI: http://hdl.handle.net/2445/66653
ISSN: 0028-3932
Appears in Collections:Articles publicats en revistes (Cognició, Desenvolupament i Psicologia de l'Educació)

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