Electrophysiological and behavioral evidence of auditory processing deficits in children with reading disorder☆

Sharma, Mridula; Purdy, Suzanne C.; Newall, Philip; Wheldall, Kevin; Beaman, Robyn; Dillon, Harvey

doi:10.1016/j.clinph.2006.02.001

Cited by 112 publications

(132 citation statements)

References 71 publications

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“…In this study, MMN was normal for speech stimuli deviating in terms of the articulation point. 18 The investigation of MMN in (C)APD patients with associated comorbidities due to other diseases shows that MMN was altered for speech stimuli but normal for pure tone stimuli in some studies, [19][20][21][22] that MMN was altered for verbal and non-verbal stimuli in other studies, 23 still others in which MMN was altered for pure tone stimuli with frequency deviations, [24][25] studies in which MMN was altered for pure tones with frequency but not duration deviations, [26][27] studies in which MMN was normal for pure tones with frequency deviations but altered for different compound tone patters, 28 and in studies in which MMN was unchanged for frequency and duration stimuli. [29][30][31][32] Our study aimed to investigate MMN in (C)APD patients, considering the diversity of results in studies of MMN in these patients, as well as the importance of undertaking the electrophysiological evaluation of auditory processing studies.…”

Section: Introductionmentioning

confidence: 99%

O Mismatch Negativity em pacientes com distúrbios do processamento auditivo (central)

Roggia

Colares

2008

Rev. Bras. Otorrinolaringol.

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O Mismatch Negativity (MMN) é um potencial evocado auditivo de longa latência que fornece uma medida objetiva das habilidades de discriminação e memória sensorial auditiva. Assim, pode ser utilizado como uma avaliação eletrofisiológica do processamento auditivo (central). OBJETIVO: Estudar o MMN em pacientes com Distúrbios do Processamento Auditivo (Central) - DPA(C). FORMA DO ESTUDO: Clínico prospectivo. MATERIAL E MÉTODO: Foram avaliados oito sujeitos com DPA(C), na faixa etária de nove a 14 anos, bem como um grupo controle. O MMN foi eliciado para estímulos tonais (tone bursts) diferindo quanto à freqüência (MMNf - estímulo padrão: 750Hz e estímulo diferente: 1000Hz ), bem como quanto à duração (MMNd - estímulo padrão: 100 ms e estímulo diferente: 50 ms; na freqüência de 1000Hz). RESULTADOS: A presença do MMNf e do MMNd foi comprovada estatisticamente em ambos os grupos estudados. Não foram constatadas diferenças significantes estatisticamente entre os valores de latência e de amplitude do MMNf e do MMNd obtidos nos dois grupos. Também não foram verificadas diferenças significantes estatisticamente entre o MMNf e o MMNd em nenhum dos grupos estudados. CONCLUSÃO: Os sujeitos com DPA(C) avaliados não apresentaram alterações no MMNf, nem no MMNd.

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Section: Introductionmentioning

confidence: 99%

O Mismatch Negativity em pacientes com distúrbios do processamento auditivo (central)

Roggia

Colares

2008

Rev. Bras. Otorrinolaringol.

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“…The results also reveal that the current clinical diagnostics do not allow the evaluation of auditory dysfunctions and their demarcation from receptive speech disorders. Still, a differentiation between auditory, i.e., sensory perceptual and cognitive or linguistic disorders is an important issue (Fitzgibbons and Gordon-Salant 1996; Cacace and McFarland 1998), also because APD is not always accompanied by weak phonological awareness (Sharma et al 2006). All this points to the need to clearly differentiate APD from speech disorders, which necessitates the inclusion of nonlinguistic test material (Moore 2006;Moore et al 2011).…”

Section: Children With Auditory Processing Disordersmentioning

confidence: 99%

“…However, some researchers argue that APD is, at least partially, caused by higher-order impairments (Moore et al 2010;BSA 2011), while others claim that APD and attentional problems are not always interrelated (Sharma et al 2009). Second, there is an ongoing debate about the relation of APD and neurodevelopmental disorders such as specific language impairment (SLI) and dyslexia (King et al 2003;Sharma et al 2006Sharma et al , 2009Ferguson et al 2011). These studies claim that there is hardly any difference in results of auditory processing (AP) measures between children with APD and children with language or reading impairments.…”

Section: Introductionmentioning

confidence: 99%

Auditory Processing Disorders with and without Central Auditory Discrimination Deficits

Ludwig

Fuchs

Kruse

et al. 2014

JARO

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Auditory processing disorder (APD) is defined as a processing deficit in the auditory modality and spans multiple processes. To date, APD diagnosis is mostly based on the utilization of speech material. Adequate nonspeech tests that allow differentiation between an actual central hearing disorder and related disorders such as specific language impairments are still not adequately available. In the present study, 84 children between 6 and 17 years of age (clinical group), referred to three audiological centers for APD diagnosis, were evaluated with standard audiological tests and additional auditory discrimination tests. Latter tests assessed the processing of basic acoustic features at two different stages of the ascending central auditory system: (1) auditory brainstem processing was evaluated by quantifying interaural frequency, level, and signal duration discrimination (interaural tests). (2) Diencephalic/telencephalic processing was assessed by varying the same acoustic parameters (plus signals with sinusoidal amplitude modulation), but presenting the test signals in conjunction with noise pulses to the contralateral ear (dichotic signal/ noise tests). Data of children in the clinical group were referenced to normative data obtained from more than 300 normally developing healthy school children. The results in the audiological and the discrimination tests diverged widely. Of the 39 children that were diagnosed with APD in the audiological clinic, 30 had deficits in auditory performance. Even more alarming was the fact that of the 45 children with a negative APD diagnosis, 32 showed clear signs of a central hearing deficit. Based on these results, we suggest revising current diagnostic procedure to evaluate APD in order to more clearly differentiate between central auditory processing deficits and higher-order (cognitive and/or language) processing deficits.

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“…Previously, the MMN has also been used to study whether children with language-learning impairments have problems with the processing of linguistic and/or non-linguistic information (e.g., Alonso-Búa et al, 2006;Lachmann et al, 2005;Meng et al, 2005;Schulte-Körne et al, 1998;Sharma et al, 2006;Uwer et al, 2002). For example, Schulte-Körne et al (1998) found that a group of dyslexic boys, around 12 years of age, showed significantly attenuated late MMNs to synthesised speech stimuli (/da/ vs. /ba/) compared to a group of control children.…”

Section: Introductionmentioning

confidence: 99%

“…Previous research has shown that ERP components can be influenced by the degree of attention that is paid to the stimuli (Clifford and Williston, 1993;Grimm et al, 2008;Rappaport et al, 1990). When the purpose is to test both auditory and phonemic discrimination in clinical populations, most studies used two different oddball series, one using tone stimuli and the other using speech stimuli (Alonso-Búa et al, 2006;Lachmann et al, 2005;Meng et al, 2005;Schulte-Körne et al, 1998;Sharma et al, 2006;Uwer et al, 2002). However, in clinical populations, it is important to obtain as much information as possible in a short test session.…”

Section: Introductionmentioning

confidence: 99%

Towards neurophysiological assessment of phonemic discrimination: Context effects of the mismatch negativity

Davids

Brink

Turennout

et al. 2009

Clinical Neurophysiology

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a b s t r a c tObjective: This study focusses on the optimal paradigm for simultaneous assessment of auditory and phonemic discrimination in clinical populations. We investigated (a) whether pitch and phonemic deviants presented together in one sequence are able to elicit mismatch negativities (MMNs) in healthy adults and (b) whether MMN elicited by a change in pitch is modulated by the presence of the phonemic deviants. Methods: Standard stimuli [i] were intermixed with small, medium or large pitch deviants or with pitch deviants of the same magnitude together with small and large phonemic deviants, [y] and [u], respectively. Results: When pitch and phonemic deviants were presented together, only the large pitch and phonemic contrasts elicited significant MMNs. When only pitch deviants were presented, the medium and large pitch contrasts elicited significant MMNs. The MMNs, in response to the medium and large pitch contrasts, were of similar magnitude across the two contexts. Conclusions: Pitch and phonemic deviants can be tested together provided the pitch contrast is relatively large. Significance: A combined neurophysiological test of phonemic and pitch discrimination, as measured by the MMN, is a time-effective tool that may provide valuable information about the underlying cause of poorly specified phonemic representations in clinical populations.Crown

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Electrophysiological and behavioral evidence of auditory processing deficits in children with reading disorder☆

Cited by 112 publications

References 71 publications

O Mismatch Negativity em pacientes com distúrbios do processamento auditivo (central)

O Mismatch Negativity em pacientes com distúrbios do processamento auditivo (central)

Auditory Processing Disorders with and without Central Auditory Discrimination Deficits

Towards neurophysiological assessment of phonemic discrimination: Context effects of the mismatch negativity

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