Phonological processing in relation to reading: An fMRI study in deaf readers

Aparicio, Mario; Gounot, Daniel; Demont, Élisabeth; Metz‐Lutz, Marie‐Noëlle

doi:10.1016/j.neuroimage.2006.12.046

Cited by 65 publications

(72 citation statements)

References 61 publications

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“…Whole brain correlations with post-CI scores showed a dorsoventral dissociation, depending on the duration of hearing loss. The dorsal network, where activity decreased with deafness duration, largely overlapped with a network described as the phonological route of reading (Aparicio, Gounot, Demont, & Metz-Lutz, 2007;Ziegler et al, 2008) used by deaf subjects to perform phonological tasks, e.g. rhyming tasks, and that we previously found to positively correlate with post-CI scores (Lazard et al, 2010).…”

Section: Discussionmentioning

confidence: 69%

Evolution of non-speech sound memory in postlingual deafness: Implications for cochlear implant rehabilitation

et al. 2011

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a b s t r a c tNeurofunctional patterns assessed before or after cochlear implantation (CI) are informative markers of implantation outcome. Because phonological memory reorganization in post-lingual deafness is predictive of the outcome, we investigated, using a cross-sectional approach, whether memory of non-speech sounds (NSS) produced by animals or objects (i.e. non-human sounds) is also reorganized, and how this relates to speech perception after CI. We used an fMRI auditory imagery task in which sounds were evoked by pictures of noisy items for post-lingual deaf candidates for CI and for normal-hearing subjects. When deaf subjects imagined sounds, the left inferior frontal gyrus, the right posterior temporal gyrus and the right amygdala were less activated compared to controls. Activity levels in these regions decreased with duration of auditory deprivation, indicating declining NSS representations. Whole brain correlations with duration of auditory deprivation and with speech scores after CI showed an activity decline in dorsal, fronto-parietal, cortical regions, and an activity increase in ventral cortical regions, the right anterior temporal pole and the hippocampal gyrus. Both dorsal and ventral reorganizations predicted poor speech perception outcome after CI. These results suggest that post-CI speech perception relies, at least partially, on the integrity of a neural system used for processing NSS that is based on audio-visual and articulatory mapping processes. When this neural system is reorganized, post-lingual deaf subjects resort to inefficient semantic-and memory-based strategies. These results complement those of other studies on speech processing, suggesting that both speech and NSS representations need to be maintained during deafness to ensure the success of CI.

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Section: Discussionmentioning

confidence: 69%

Evolution of non-speech sound memory in postlingual deafness: Implications for cochlear implant rehabilitation

et al. 2011

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“…The majority of studies that investigate the role of phonology in the deaf population do so through meta-phonological tasks and phonological awareness, which require explicit phonological judgments (Aparicio, Gounot, Demont, & Metz-Lutz, 2007;Campbell & Wright, 1988;Dyer, MacSweeney, Szczerbinski, Green, & Campbell, 2003;Transler, Leybaert, & Gombert, 1999;Waters & Doehring, 1990). In addition, many of these studies focus on deaf children, where reading is still in the development phase.…”

Section: Introductionmentioning

confidence: 99%

Phonological and orthographic coding in deaf skilled readers

2017

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“…The authors suggested that oral language rhyme sensitivity, presumably developed via speechreading and articulatory information in the deaf participants, is supported by the same neural systems in both deaf and hearing individuals. Results from fMRI studies using pictures (MacSweeney, Brammer, Waters, & Goswami, 2009) or written words (Aparicio, Gounot, Demont, & Metz-Lutz, 2007) as stimuli also suggest that similar neuronal networks are engaged in rhyme judgment processing in deaf as in normally hearing individuals. Deaf participants however show larger activations in the left IFG, suggesting enhanced use of articulatory recoding and spelling-to-sound conversion strategies (Aparicio et al, 2007;MacSweeney et al, 2009).…”

Section: Rhyme Judgment and Explicit Processingmentioning

confidence: 89%

“…Results from fMRI studies using pictures (MacSweeney, Brammer, Waters, & Goswami, 2009) or written words (Aparicio, Gounot, Demont, & Metz-Lutz, 2007) as stimuli also suggest that similar neuronal networks are engaged in rhyme judgment processing in deaf as in normally hearing individuals. Deaf participants however show larger activations in the left IFG, suggesting enhanced use of articulatory recoding and spelling-to-sound conversion strategies (Aparicio et al, 2007;MacSweeney et al, 2009). The present results show that the R-O+ condition may be important to include when examining rhyme judgments in individuals with HI.…”

Section: Rhyme Judgment and Explicit Processingmentioning

confidence: 89%

Representing sounds and spellings: Phonological decline and compensatory working memory in acquired hearing impairment

Classon¹

2013

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Representing sounds and spellingsPhonological decline and compensatory working memory in acquired hearing impairment Pursue one great decisive aim with force and determination.Carl von Clausewitz "On war" AbstractLong-term severe acquired hearing impairment (HI) is associated with a deterioration of phonological representations in semantic long-term memory that negatively affects phonological awareness (Andersson, 2002). The primary aim of this thesis was twofold: to use electrophysiological and behavioral measures to examine phonological processing in adults with moderate-to-profound, postlingually acquired HI, and to determine whether explicit working memory processing of phonology and individual working memory capacity (WMC) can compensate for phonological decline in this group. The secondary aim was to provide reference data for a Swedish test of WMC that is frequently used in the field of cognitive hearing science and to examine the relation between test performance and speech recognition in noise in a larger sample of individuals with HI.In papers I-III, non-auditory tasks were used to examine input and output phonological processing, episodic long-term memory, and WMC in individuals with HI as compared to a reference group with normal hearing. Text-based rhyme judgments of word pairs with matching or mismatching orthography and letter fluency were used to assess phonological processing. In papers II-III, the relation between phonological task performance and tests of WMC (papers II-III) and episodic long-term memory (paper II) were examined. In paper I, electrophysiological indices of phonological processing under conditions that either allowed for, or limited, involvement of explicit processing were investigated. While the overall purpose was to test if working memory processing of phonology and individual differences in WMC could compensate for phonological decline in individuals with HI, paper II also tested a proposal made by the Ease of Language Understanding (ELU) model . The ELU postulates that individual differences in WMC will modulate task performance under conditions with increased occurrence of phonological mismatch, as in rhyme judgment of written words with mismatching orthography by individuals with degraded phonological representations.Paper IV examined performance on the reading span test (RST;Rönnberg, Lyxell, Arlinger, & Kinnefors, 1989), the measure of WMC used in papers I-III, in a larger sample of individuals with HI who had participated in different projects from our laboratory and its collaborators. The test is theoretically anchored in the capacity theory of working memory (Just & Carpenter, 1992) and plays an important role in the ELU model. Test performance in two different age groups were compared (50-69, 70-89), and the original version of the test was compared to a shortened version. Examination of the relation between test performance and speech recognition in noise was also conducted.The results replicated previous findings of phonological processing declines following acqu...

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Phonological processing in relation to reading: An fMRI study in deaf readers

Cited by 65 publications

References 61 publications

Evolution of non-speech sound memory in postlingual deafness: Implications for cochlear implant rehabilitation

Evolution of non-speech sound memory in postlingual deafness: Implications for cochlear implant rehabilitation

Phonological and orthographic coding in deaf skilled readers

Representing sounds and spellings: Phonological decline and compensatory working memory in acquired hearing impairment

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