737 recherche sur le mot-clé 'Auditory-word-processing'

Event-related brain potentials during natural speech processing: effects of semantic, morphological and syntactic violations / Angela D. FRIEDERICI in Cognitive Brain Research, 1-3 (October 1993)

Public ISBD [article]  inCognitive Brain Research > 1-3 (October 1993) . - p.183-192 Titre : Event-related brain potentials during natural speech processing: effects of semantic, morphological and syntactic violations Type de document : texte imprimé Auteurs : Angela D. FRIEDERICI, Auteur ; Erdmut PFEIFER, Auteur ; Anja HAHNE, Auteur Année de publication : 1993 Article en page(s) : p.183-192 Langues : Anglais (eng) Mots-clés : Event-related-potential N400 Auditory-word-processing Semantic-priming Syntactic-priming Index. décimale : PER Périodiques Résumé : The present study investigated different aspects of auditory language comprehension. The sentences which were presented as connected speech were either correct or incorrect including a semantic error (selectional restriction), a morphological error (verb inflection), or a syntactic error (phrase structure). After each sentence, a probe word was presented auditorily, and subjects had to decide whether this word was part of the preceding sentence or not. Event-related brain potentials (ERPs) were recorded from 7 scalp electrodes. The ERPs evoked by incorrect sentences differed significantly from the correct ones as a function of error type. Semantic anomalies evoked a ‘classical’ N400 pattern. Morphological errors elicited a pronounced negativity between 300 and 600 ms followed by late positivity. Syntactic errors, in contrast, evoked an early negativity peaking around 180 ms followed by a negativity around 400 ms. The early negativity was only significant over the left anterior electrode. The present data demonstrate that linguistic errors of different categories evoke different ERP patterns. They indicate that with using connected speech as input, different aspects of language comprehension processes cannot only be described with respect to their temporal structure, but eventually also with respect to possible brain systems subserving these processes. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=781 [article] Event-related brain potentials during natural speech processing: effects of semantic, morphological and syntactic violations [texte imprimé] / Angela D. FRIEDERICI, Auteur ; Erdmut PFEIFER, Auteur ; Anja HAHNE, Auteur . - 1993 . - p.183-192. Langues : Anglais (eng) in Cognitive Brain Research > 1-3 (October 1993) . - p.183-192 Mots-clés : Event-related-potential N400 Auditory-word-processing Semantic-priming Syntactic-priming Index. décimale : PER Périodiques Résumé : The present study investigated different aspects of auditory language comprehension. The sentences which were presented as connected speech were either correct or incorrect including a semantic error (selectional restriction), a morphological error (verb inflection), or a syntactic error (phrase structure). After each sentence, a probe word was presented auditorily, and subjects had to decide whether this word was part of the preceding sentence or not. Event-related brain potentials (ERPs) were recorded from 7 scalp electrodes. The ERPs evoked by incorrect sentences differed significantly from the correct ones as a function of error type. Semantic anomalies evoked a ‘classical’ N400 pattern. Morphological errors elicited a pronounced negativity between 300 and 600 ms followed by late positivity. Syntactic errors, in contrast, evoked an early negativity peaking around 180 ms followed by a negativity around 400 ms. The early negativity was only significant over the left anterior electrode. The present data demonstrate that linguistic errors of different categories evoke different ERP patterns. They indicate that with using connected speech as input, different aspects of language comprehension processes cannot only be described with respect to their temporal structure, but eventually also with respect to possible brain systems subserving these processes. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=781

Acoustic Exaggeration Enhances Speech Discrimination in Young Autistic Children / Luodi YU ; Lizhi BAN ; Aiwen YI ; Jing XIN ; Suping LI ; Suiping WANG ; Laurent MOTTRON in Autism Research, 18-2 (February 2025)  

Public ISBD [article]  inAutism Research > 18-2 (February 2025) . - p.402-414 Titre : Acoustic Exaggeration Enhances Speech Discrimination in Young Autistic Children : Autism Research Type de document : texte imprimé Auteurs : Luodi YU, Auteur ; Lizhi BAN, Auteur ; Aiwen YI, Auteur ; Jing XIN, Auteur ; Suping LI, Auteur ; Suiping WANG, Auteur ; Laurent MOTTRON, Auteur Article en page(s) : p.402-414 Langues : Anglais (eng) Mots-clés : auditory processing autism spectrum disorders EEG multivariate pattern analysis speech processing Index. décimale : PER Périodiques Résumé : ABSTRACT Child-directed speech (CDS), which amplifies acoustic and social features of speech during interactions with young children, promotes typical phonetic and language development. In autism, both behavioral and brain data indicate reduced sensitivity to human speech, which predicts absent, decreased, or atypical benefits of exaggerated speech signals such as CDS. This study investigates the impact of exaggerated fundamental frequency (F0) and voice-onset time on the neural processing of speech sounds in 22 Chinese-speaking autistic children aged 2 7 years old with a history of speech delays, compared with 25 typically developing (TD) peers. Electroencephalography (EEG) data were collected during passive listening to exaggerated and non-exaggerated syllables. A time-resolved multivariate pattern analysis (MVPA) was used to evaluate the potential effects of acoustic exaggeration on syllable discrimination in terms of neural decoding accuracy. For non-exaggerated syllables, neither the autism nor the TD group achieved above-chance decoding accuracy. In contrast, for exaggerated syllables, both groups achieved above-chance decoding, indicating significant syllable discrimination, with no difference in accuracy between the autism and TD groups. However, the temporal generalization patterns in the MVPA results revealed distinct neural mechanisms supporting syllable discrimination between the groups. Although the TD group demonstrated a left-hemisphere advantage for decoding and generalization, the autism group displayed similar decoding patterns between hemispheres. These findings highlight the potential of selective acoustic exaggeration to support speech learning in autistic children, underscoring the importance of tailored, sensory-based interventions. En ligne : https://doi.org/10.1002/aur.3301 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=547 [article] Acoustic Exaggeration Enhances Speech Discrimination in Young Autistic Children : Autism Research [texte imprimé] / Luodi YU, Auteur ; Lizhi BAN, Auteur ; Aiwen YI, Auteur ; Jing XIN, Auteur ; Suping LI, Auteur ; Suiping WANG, Auteur ; Laurent MOTTRON, Auteur . - p.402-414. Langues : Anglais (eng) in Autism Research > 18-2 (February 2025) . - p.402-414 Mots-clés : auditory processing autism spectrum disorders EEG multivariate pattern analysis speech processing Index. décimale : PER Périodiques Résumé : ABSTRACT Child-directed speech (CDS), which amplifies acoustic and social features of speech during interactions with young children, promotes typical phonetic and language development. In autism, both behavioral and brain data indicate reduced sensitivity to human speech, which predicts absent, decreased, or atypical benefits of exaggerated speech signals such as CDS. This study investigates the impact of exaggerated fundamental frequency (F0) and voice-onset time on the neural processing of speech sounds in 22 Chinese-speaking autistic children aged 2 7 years old with a history of speech delays, compared with 25 typically developing (TD) peers. Electroencephalography (EEG) data were collected during passive listening to exaggerated and non-exaggerated syllables. A time-resolved multivariate pattern analysis (MVPA) was used to evaluate the potential effects of acoustic exaggeration on syllable discrimination in terms of neural decoding accuracy. For non-exaggerated syllables, neither the autism nor the TD group achieved above-chance decoding accuracy. In contrast, for exaggerated syllables, both groups achieved above-chance decoding, indicating significant syllable discrimination, with no difference in accuracy between the autism and TD groups. However, the temporal generalization patterns in the MVPA results revealed distinct neural mechanisms supporting syllable discrimination between the groups. Although the TD group demonstrated a left-hemisphere advantage for decoding and generalization, the autism group displayed similar decoding patterns between hemispheres. These findings highlight the potential of selective acoustic exaggeration to support speech learning in autistic children, underscoring the importance of tailored, sensory-based interventions. En ligne : https://doi.org/10.1002/aur.3301 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=547

Acute administration of NLX-101, a Serotonin 1A receptor agonist, improves auditory temporal processing during development in a mouse model of Fragile X Syndrome / Xin TAO in Journal of Neurodevelopmental Disorders, 17 (2025)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 17 (2025) Titre : Acute administration of NLX-101, a Serotonin 1A receptor agonist, improves auditory temporal processing during development in a mouse model of Fragile X Syndrome Type de document : texte imprimé Auteurs : Xin TAO, Auteur ; Katilynne CROOM, Auteur ; Adrian NEWMAN-TANCREDI, Auteur ; Mark VARNEY, Auteur ; Khaleel A. RAZAK, Auteur Langues : Anglais (eng) Mots-clés : Animals  Fragile X Syndrome/physiopathology  Disease Models, Animal  Mice, Knockout  Mice  Fragile X Mental Retardation Protein/genetics  Male  Electroencephalography  Serotonin 5-HT1 Receptor Agonists/pharmacology/administration & dosage  Auditory Perception/drug effects/physiology  Female  Mice, Inbred C57BL  Evoked Potentials, Auditory/drug effects/physiology  5-HT1A receptors  Autism spectrum disorders  Fragile X syndrome  Sensory hypersensitivity  Serotonin  Speech processing  Temporal processing  by Institutional Animal Care and Use Committee at the University of California,  Riverside. Consent for publication: Not applicable. Competing interests: MV &  AN-T are Shareholders in Neurolixis. Index. décimale : PER Périodiques Résumé : BACKGROUND: Fragile X syndrome (FXS) is a leading known genetic cause of intellectual disability and autism spectrum disorders (ASD)-associated behaviors. A consistent and debilitating phenotype of FXS is auditory hypersensitivity that may lead to delayed language and high anxiety. Consistent with findings in FXS human studies, the mouse model of FXS, the Fmr1 knock out (KO) mouse, shows auditory hypersensitivity and temporal processing deficits. In electroencephalograph (EEG) recordings from humans and mice, these deficits manifest as increased N1 amplitudes in event-related potentials (ERP), increased gamma band single trial power (STP) and reduced phase locking to rapid temporal modulations of sound. In our previous study, we found that administration of the selective serotonin-1 A (5-HT(1A))receptor biased agonist, NLX-101, protected Fmr1 KO mice from auditory hypersensitivity-associated seizures. Here we tested the hypothesis that NLX-101 will normalize EEG phenotypes in developing Fmr1 KO mice. METHODS: To test this hypothesis, we examined the effect of NLX-101 on EEG phenotypes in male and female wildtype (WT) and Fmr1 KO mice. Using epidural electrodes, we recorded auditory event related potentials (ERP) and auditory temporal processing with a gap-in-noise auditory steady state response (ASSR) paradigm at two ages, postnatal (P) 21 and 30 days, from both auditory and frontal cortices of awake, freely moving mice, following NLX-101 (at 1.8 mg/kg i.p.) or saline administration. RESULTS: Saline-injected Fmr1 KO mice showed increased N1 amplitudes, increased STP and reduced phase locking to auditory gap-in-noise stimuli versus wild-type mice, reproducing previously published EEG phenotypes. An acute injection of NLX-101 did not alter ERP amplitudes at either P21 or P30, but significantly reduces STP at P30. Inter-trial phase clustering was significantly increased in both age groups with NLX-101, indicating improved temporal processing. The differential effects of serotonin modulation on ERP, background power and temporal processing suggest different developmental mechanisms leading to these phenotypes. CONCLUSIONS: These results suggest that NLX-101 could constitute a promising treatment option for targeting post-synaptic 5-HT(1A) receptors to improve auditory temporal processing, which in turn may improve speech and language function in FXS. En ligne : https://dx.doi.org/10.1186/s11689-024-09587-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=576 [article] Acute administration of NLX-101, a Serotonin 1A receptor agonist, improves auditory temporal processing during development in a mouse model of Fragile X Syndrome [texte imprimé] / Xin TAO, Auteur ; Katilynne CROOM, Auteur ; Adrian NEWMAN-TANCREDI, Auteur ; Mark VARNEY, Auteur ; Khaleel A. RAZAK, Auteur. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 17 (2025) Mots-clés : Animals  Fragile X Syndrome/physiopathology  Disease Models, Animal  Mice, Knockout  Mice  Fragile X Mental Retardation Protein/genetics  Male  Electroencephalography  Serotonin 5-HT1 Receptor Agonists/pharmacology/administration & dosage  Auditory Perception/drug effects/physiology  Female  Mice, Inbred C57BL  Evoked Potentials, Auditory/drug effects/physiology  5-HT1A receptors  Autism spectrum disorders  Fragile X syndrome  Sensory hypersensitivity  Serotonin  Speech processing  Temporal processing  by Institutional Animal Care and Use Committee at the University of California,  Riverside. Consent for publication: Not applicable. Competing interests: MV &  AN-T are Shareholders in Neurolixis. Index. décimale : PER Périodiques Résumé : BACKGROUND: Fragile X syndrome (FXS) is a leading known genetic cause of intellectual disability and autism spectrum disorders (ASD)-associated behaviors. A consistent and debilitating phenotype of FXS is auditory hypersensitivity that may lead to delayed language and high anxiety. Consistent with findings in FXS human studies, the mouse model of FXS, the Fmr1 knock out (KO) mouse, shows auditory hypersensitivity and temporal processing deficits. In electroencephalograph (EEG) recordings from humans and mice, these deficits manifest as increased N1 amplitudes in event-related potentials (ERP), increased gamma band single trial power (STP) and reduced phase locking to rapid temporal modulations of sound. In our previous study, we found that administration of the selective serotonin-1 A (5-HT(1A))receptor biased agonist, NLX-101, protected Fmr1 KO mice from auditory hypersensitivity-associated seizures. Here we tested the hypothesis that NLX-101 will normalize EEG phenotypes in developing Fmr1 KO mice. METHODS: To test this hypothesis, we examined the effect of NLX-101 on EEG phenotypes in male and female wildtype (WT) and Fmr1 KO mice. Using epidural electrodes, we recorded auditory event related potentials (ERP) and auditory temporal processing with a gap-in-noise auditory steady state response (ASSR) paradigm at two ages, postnatal (P) 21 and 30 days, from both auditory and frontal cortices of awake, freely moving mice, following NLX-101 (at 1.8 mg/kg i.p.) or saline administration. RESULTS: Saline-injected Fmr1 KO mice showed increased N1 amplitudes, increased STP and reduced phase locking to auditory gap-in-noise stimuli versus wild-type mice, reproducing previously published EEG phenotypes. An acute injection of NLX-101 did not alter ERP amplitudes at either P21 or P30, but significantly reduces STP at P30. Inter-trial phase clustering was significantly increased in both age groups with NLX-101, indicating improved temporal processing. The differential effects of serotonin modulation on ERP, background power and temporal processing suggest different developmental mechanisms leading to these phenotypes. CONCLUSIONS: These results suggest that NLX-101 could constitute a promising treatment option for targeting post-synaptic 5-HT(1A) receptors to improve auditory temporal processing, which in turn may improve speech and language function in FXS. En ligne : https://dx.doi.org/10.1186/s11689-024-09587-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=576

Age and Sensory Processing Abnormalities Predict Declines in Encoding and Recall of Temporally Manipulated Speech in High-Functioning Adults with ASD / Jennifer L. MAYER in Autism Research, 7-1 (February 2014)  

Public ISBD [article]  inAutism Research > 7-1 (February 2014) . - p.40-49 Titre : Age and Sensory Processing Abnormalities Predict Declines in Encoding and Recall of Temporally Manipulated Speech in High-Functioning Adults with ASD Type de document : texte imprimé Auteurs : Jennifer L. MAYER, Auteur ; Pamela HEATON, Auteur Article en page(s) : p.40-49 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorders  Speech Perception  Auditory Processing  Aging Index. décimale : PER Périodiques Résumé : While temporal and perceptual processing abnormalities, identified in a number of electrophysiological and brain imaging studies of individuals with (ASD), are likely to impact on speech perception, surprisingly little is known about the behavioral outcomes of such abnormalities. It has been hypothesized that rapid temporal processing deficits may be linked to impaired language development through interference with acoustic information during speech perception. The present study aimed to investigate the impact of temporal changes on encoding and recall of speech, and the associated cognitive, clinical, and behavioral correlates in adults with ASD. Research carried out with typically developing (TD) adults has shown that word recall diminishes as the speed of speech increases, and it was predicted that the magnitude of this effect would be far greater in those with ASD because of a preexisting rapid temporal processing deficit. Nineteen high-functioning adults with ASD, and age- and intelligence-matched TD controls performed verbatim recall of temporally manipulated sentences. Reduced levels of word recall in response to increases in presentation speed were observed, and this effect was greater in the older participants in the ASD group than in the control group. This is the first study to show that both sensory abnormalities and aging impact on speech encoding in ASD. Auditory processing deficits in ASD may be indicative of an association with the sensory abnormalities and social and communication impairments characterizing the disorder. En ligne : http://dx.doi.org/10.1002/aur.1333 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=227 [article] Age and Sensory Processing Abnormalities Predict Declines in Encoding and Recall of Temporally Manipulated Speech in High-Functioning Adults with ASD [texte imprimé] / Jennifer L. MAYER, Auteur ; Pamela HEATON, Auteur . - p.40-49. Langues : Anglais (eng) in Autism Research > 7-1 (February 2014) . - p.40-49 Mots-clés : Autism Spectrum Disorders  Speech Perception  Auditory Processing  Aging Index. décimale : PER Périodiques Résumé : While temporal and perceptual processing abnormalities, identified in a number of electrophysiological and brain imaging studies of individuals with (ASD), are likely to impact on speech perception, surprisingly little is known about the behavioral outcomes of such abnormalities. It has been hypothesized that rapid temporal processing deficits may be linked to impaired language development through interference with acoustic information during speech perception. The present study aimed to investigate the impact of temporal changes on encoding and recall of speech, and the associated cognitive, clinical, and behavioral correlates in adults with ASD. Research carried out with typically developing (TD) adults has shown that word recall diminishes as the speed of speech increases, and it was predicted that the magnitude of this effect would be far greater in those with ASD because of a preexisting rapid temporal processing deficit. Nineteen high-functioning adults with ASD, and age- and intelligence-matched TD controls performed verbatim recall of temporally manipulated sentences. Reduced levels of word recall in response to increases in presentation speed were observed, and this effect was greater in the older participants in the ASD group than in the control group. This is the first study to show that both sensory abnormalities and aging impact on speech encoding in ASD. Auditory processing deficits in ASD may be indicative of an association with the sensory abnormalities and social and communication impairments characterizing the disorder. En ligne : http://dx.doi.org/10.1002/aur.1333 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=227

Attenuated processing of vowels in the left temporal cortex predicts speech-in-noise perception deficit in children with autism / Kirill A. FADEEV in Journal of Neurodevelopmental Disorders, 16 (2024)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 16 (2024) Titre : Attenuated processing of vowels in the left temporal cortex predicts speech-in-noise perception deficit in children with autism Type de document : texte imprimé Auteurs : Kirill A. FADEEV, Auteur ; Ilacai V. ROMERO REYES, Auteur ; Dzerassa E. GOIAEVA, Auteur ; Tatiana S. OBUKHOVA, Auteur ; Tatiana M. OVSIANNIKOVA, Auteur ; Andrey O. PROKOFYEV, Auteur ; Anna M. RYTIKOVA, Auteur ; Artem Y. NOVIKOV, Auteur ; Vladimir V. KOZUNOV, Auteur ; Tatiana A. STROGANOVA, Auteur ; Elena V. OREKHOVA, Auteur Langues : Anglais (eng) Mots-clés : Humans  Male  Speech Perception/physiology  Magnetoencephalography  Child  Temporal Lobe/physiopathology  Noise  Acoustic Stimulation  Evoked Potentials, Auditory/physiology  Autism Spectrum Disorder/physiopathology/complications  Adolescent  Auditory Cortex/physiopathology  Autistic Disorder/physiopathology/complications  Auditory processing disorder  Autism spectrum disorder (ASD)  Children  Formant structure  Magnetoencephalography (MEG)  Periodicity pitch  Speech-in-noise perception  Sustained processing negativity (SPN)  Vowels  of the Moscow State University of Psychology and Education approved this  investigation. All children gave verbal consent to participate in the study and  their caregivers gave written consent to participate. Consent for publication:  All children gave verbal consent to participate in the study and their caregivers  gave written consent for publication of anonymized data. Competing interests: The  authors declare no competing interests. Index. décimale : PER Périodiques Résumé : BACKGROUND: Difficulties with speech-in-noise perception in autism spectrum disorders (ASD) may be associated with impaired analysis of speech sounds, such as vowels, which represent the fundamental phoneme constituents of human speech. Vowels elicit early (< 100 ms) sustained processing negativity (SPN) in the auditory cortex that reflects the detection of an acoustic pattern based on the presence of formant structure and/or periodic envelope information (f0) and its transformation into an auditory "object". METHODS: We used magnetoencephalography (MEG) and individual brain models to investigate whether SPN is altered in children with ASD and whether this deficit is associated with impairment in their ability to perceive speech in the background of noise. MEG was recorded while boys with ASD and typically developing boys passively listened to sounds that differed in the presence/absence of f0 periodicity and formant structure. Word-in-noise perception was assessed in the separate psychoacoustic experiment using stationary and amplitude modulated noise with varying signal-to-noise ratio. RESULTS: SPN was present in both groups with similarly early onset. In children with ASD, SPN associated with processing formant structure was reduced predominantly in the cortical areas lateral to and medial to the primary auditory cortex, starting at ~ 150-200 ms after the stimulus onset. In the left hemisphere, this deficit correlated with impaired ability of children with ASD to recognize words in amplitude-modulated noise, but not in stationary noise. CONCLUSIONS: These results suggest that perceptual grouping of vowel formants into phonemes is impaired in children with ASD and that, in the left hemisphere, this deficit contributes to their difficulties with speech perception in fluctuating background noise. En ligne : https://dx.doi.org/10.1186/s11689-024-09585-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=576 [article] Attenuated processing of vowels in the left temporal cortex predicts speech-in-noise perception deficit in children with autism [texte imprimé] / Kirill A. FADEEV, Auteur ; Ilacai V. ROMERO REYES, Auteur ; Dzerassa E. GOIAEVA, Auteur ; Tatiana S. OBUKHOVA, Auteur ; Tatiana M. OVSIANNIKOVA, Auteur ; Andrey O. PROKOFYEV, Auteur ; Anna M. RYTIKOVA, Auteur ; Artem Y. NOVIKOV, Auteur ; Vladimir V. KOZUNOV, Auteur ; Tatiana A. STROGANOVA, Auteur ; Elena V. OREKHOVA, Auteur. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 16 (2024) Mots-clés : Humans  Male  Speech Perception/physiology  Magnetoencephalography  Child  Temporal Lobe/physiopathology  Noise  Acoustic Stimulation  Evoked Potentials, Auditory/physiology  Autism Spectrum Disorder/physiopathology/complications  Adolescent  Auditory Cortex/physiopathology  Autistic Disorder/physiopathology/complications  Auditory processing disorder  Autism spectrum disorder (ASD)  Children  Formant structure  Magnetoencephalography (MEG)  Periodicity pitch  Speech-in-noise perception  Sustained processing negativity (SPN)  Vowels  of the Moscow State University of Psychology and Education approved this  investigation. All children gave verbal consent to participate in the study and  their caregivers gave written consent to participate. Consent for publication:  All children gave verbal consent to participate in the study and their caregivers  gave written consent for publication of anonymized data. Competing interests: The  authors declare no competing interests. Index. décimale : PER Périodiques Résumé : BACKGROUND: Difficulties with speech-in-noise perception in autism spectrum disorders (ASD) may be associated with impaired analysis of speech sounds, such as vowels, which represent the fundamental phoneme constituents of human speech. Vowels elicit early (< 100 ms) sustained processing negativity (SPN) in the auditory cortex that reflects the detection of an acoustic pattern based on the presence of formant structure and/or periodic envelope information (f0) and its transformation into an auditory "object". METHODS: We used magnetoencephalography (MEG) and individual brain models to investigate whether SPN is altered in children with ASD and whether this deficit is associated with impairment in their ability to perceive speech in the background of noise. MEG was recorded while boys with ASD and typically developing boys passively listened to sounds that differed in the presence/absence of f0 periodicity and formant structure. Word-in-noise perception was assessed in the separate psychoacoustic experiment using stationary and amplitude modulated noise with varying signal-to-noise ratio. RESULTS: SPN was present in both groups with similarly early onset. In children with ASD, SPN associated with processing formant structure was reduced predominantly in the cortical areas lateral to and medial to the primary auditory cortex, starting at ~ 150-200 ms after the stimulus onset. In the left hemisphere, this deficit correlated with impaired ability of children with ASD to recognize words in amplitude-modulated noise, but not in stationary noise. CONCLUSIONS: These results suggest that perceptual grouping of vowel formants into phonemes is impaired in children with ASD and that, in the left hemisphere, this deficit contributes to their difficulties with speech perception in fluctuating background noise. En ligne : https://dx.doi.org/10.1186/s11689-024-09585-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=576

Atypical Perception of Sounds in Minimally and Low Verbal Children and Adolescents With Autism as Revealed by Behavioral and Neural Measures / Sophie SCHWARTZ in Autism Research, 13-10 (October 2020)  

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Auditory Attention Deployment in Young Adults with Autism Spectrum Disorder / Katherine A. EMMONS in Journal of Autism and Developmental Disorders, 52-4 (April 2022)  

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Auditory perceptual learning in autistic adults / Samra ALISPAHIC in Autism Research, 15-8 (August 2022)  

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Auditory processing in autism spectrum disorder: Mismatch negativity deficits / Chantal VLASKAMP in Autism Research, 10-11 (November 2017)  

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Berard Auditory Integration Training: Behavior Changes Related to Sensory Modulation / Sally S. BROCKETT in Autism Insights, (February 2014)  

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