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Virtala P, Partanen E, Kujala T. Impaired Perception and Neural Processing of Rules in Developmental Dyslexia. JOURNAL OF LEARNING DISABILITIES 2021; 54:452-465. [PMID: 33478339 PMCID: PMC8559173 DOI: 10.1177/0022219420988004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Rules and regularities of language are typically processed in an implicit and effortless way in the human brain. Individuals with developmental dyslexia have problems in implicit learning of regularities in sequential stimuli, but the neural basis of this deficit has not been studied. This study investigated extraction and utilization of a complex auditory rule at neural and perceptual levels in 18 adults with dyslexia and 20 typical readers. Mismatch negativity (MMN) and P3a responses to rule violations in speech stimuli, reflecting change detection and attention switch, respectively, were recorded with electroencephalogram. Both groups reported no or little explicit awareness of the rule, suggesting implicit processing. People with dyslexia showed deficient extraction of the rule evidenced by diminished MMNs estimated to originate particularly from the left perisylvian region. The group difference persisted in the attentive condition after the participants were told about the rule, and behavioral detection of the rule violations was poor in people with dyslexia, possibly suggesting difficulties also in utilizing explicit information of the rule. Based on these results, the speech processing difficulties in dyslexia extend beyond phoneme discrimination and basic auditory feature extraction. Challenges in implicit extraction and effortless adoption of complex auditory rules may be central to language learning difficulties in dyslexia.
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2
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Nora A, Renvall H, Ronimus M, Kere J, Lyytinen H, Salmelin R. Children at risk for dyslexia show deficient left-hemispheric memory representations for new spoken word forms. Neuroimage 2021; 229:117739. [PMID: 33454404 DOI: 10.1016/j.neuroimage.2021.117739] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/07/2021] [Accepted: 01/09/2021] [Indexed: 11/28/2022] Open
Abstract
Developmental dyslexia is a specific learning disorder with impairments in reading and spelling acquisition. Apart from literacy problems, dyslexics show inefficient speech encoding and deficient novel word learning, with underlying problems in phonological processing and learning. These problems have been suggested to be related to deficient specialization of the left hemisphere for language processing. To examine this possibility, we tracked with magnetoencephalography (MEG) the activation of the bilateral temporal cortices during formation of neural memory traces for new spoken word forms in 7-8-year-old children with high familial dyslexia risk and in controls. The at-risk children improved equally to their peers in overt repetition of recurring new word forms, but were poorer in explicit recognition of the recurring word forms. Both groups showed reduced activation for the recurring word forms 400-1200 ms after word onset in the right auditory cortex, replicating the results of our previous study on typically developing children (Nora et al., 2017, Children show right-lateralized effects of spoken word-form learning. PLoS ONE 12(2): e0171034). However, only the control group consistently showed a similar reduction of activation for recurring word forms in the left temporal areas. The results highlight the importance of left-hemispheric phonological processing for efficient phonological representations and its disruption in dyslexia.
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Affiliation(s)
- A Nora
- Department of Neuroscience and Biomedical Engineering, and Aalto NeuroImaging, Aalto University, P.O. Box 12200, FI-00076 Aalto, Finland.
| | - H Renvall
- Department of Neuroscience and Biomedical Engineering, and Aalto NeuroImaging, Aalto University, P.O. Box 12200, FI-00076 Aalto, Finland
| | - M Ronimus
- Niilo Mäki Instituutti, FI-40100 Jyväskylä, Finland
| | - J Kere
- Department of Biosciences, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - H Lyytinen
- Department of Psychology, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - R Salmelin
- Department of Neuroscience and Biomedical Engineering, and Aalto NeuroImaging, Aalto University, P.O. Box 12200, FI-00076 Aalto, Finland
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Malins JG, Landi N, Ryherd K, Frijters JC, Magnuson JS, Rueckl JG, Pugh KR, Sevcik R, Morris R. Is that a pibu or a pibo? Children with reading and language deficits show difficulties in learning and overnight consolidation of phonologically similar pseudowords. Dev Sci 2020; 24:e13023. [PMID: 32691904 PMCID: PMC7988620 DOI: 10.1111/desc.13023] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 07/04/2020] [Accepted: 07/11/2020] [Indexed: 01/24/2023]
Abstract
Word learning is critical for the development of reading and language comprehension skills. Although previous studies have indicated that word learning is compromised in children with reading disability (RD) or developmental language disorder (DLD), it is less clear how word learning difficulties manifest in children with comorbid RD and DLD. Furthermore, it is unclear whether word learning deficits in RD or DLD include difficulties with offline consolidation of newly learned words. In the current study, we employed an artificial lexicon learning paradigm with an overnight design to investigate how typically developing (TD) children (N = 25), children with only RD (N = 93), and children with both RD and DLD (N = 34) learned and remembered a set of phonologically similar pseudowords. Results showed that compared to TD children, children with RD exhibited: (i) slower growth in discrimination accuracy for cohort item pairs sharing an onset (e.g. pibu‐pibo), but not for rhyming item pairs (e.g. pibu‐dibu); and (ii) lower discrimination accuracy for both cohort and rhyme item pairs on Day 2, even when accounting for differences in Day 1 learning. Moreover, children with comorbid RD and DLD showed learning and retention deficits that extended to unrelated item pairs that were phonologically dissimilar (e.g. pibu‐tupa), suggestive of broader impairments compared to children with only RD. These findings provide insights into the specific learning deficits underlying RD and DLD and motivate future research concerning how children use phonological similarity to guide the organization of new word knowledge.
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Affiliation(s)
- Jeffrey G Malins
- Department of Psychology, Georgia State University, Atlanta, GA, USA.,Haskins Laboratories, New Haven, CT, USA
| | - Nicole Landi
- Haskins Laboratories, New Haven, CT, USA.,Department of Psychological Sciences, University of Connecticut, Storrs, CT, USA
| | - Kayleigh Ryherd
- Haskins Laboratories, New Haven, CT, USA.,Department of Psychological Sciences, University of Connecticut, Storrs, CT, USA
| | - Jan C Frijters
- Faculty of Social Sciences, Department of Child and Youth Studies, Brock University, St. Catharines, ON, Canada
| | - James S Magnuson
- Department of Psychological Sciences, University of Connecticut, Storrs, CT, USA
| | - Jay G Rueckl
- Haskins Laboratories, New Haven, CT, USA.,Department of Psychological Sciences, University of Connecticut, Storrs, CT, USA
| | - Kenneth R Pugh
- Haskins Laboratories, New Haven, CT, USA.,Department of Psychological Sciences, University of Connecticut, Storrs, CT, USA.,Department of Linguistics, Yale University, New Haven, CT, USA.,Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT, USA
| | - Rose Sevcik
- Department of Psychology, Georgia State University, Atlanta, GA, USA
| | - Robin Morris
- Department of Psychology, Georgia State University, Atlanta, GA, USA
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Martinez-Murcia FJ, Ortiz A, Gorriz JM, Ramirez J, Lopez-Abarejo PJ, Lopez-Zamora M, Luque JL. EEG Connectivity Analysis Using Denoising Autoencoders for the Detection of Dyslexia. Int J Neural Syst 2020; 30:2050037. [PMID: 32466692 DOI: 10.1142/s0129065720500379] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The Temporal Sampling Framework (TSF) theorizes that the characteristic phonological difficulties of dyslexia are caused by an atypical oscillatory sampling at one or more temporal rates. The LEEDUCA study conducted a series of Electroencephalography (EEG) experiments on children listening to amplitude modulated (AM) noise with slow-rythmic prosodic (0.5-1[Formula: see text]Hz), syllabic (4-8[Formula: see text]Hz) or the phoneme (12-40[Formula: see text]Hz) rates, aimed at detecting differences in perception of oscillatory sampling that could be associated with dyslexia. The purpose of this work is to check whether these differences exist and how they are related to children's performance in different language and cognitive tasks commonly used to detect dyslexia. To this purpose, temporal and spectral inter-channel EEG connectivity was estimated, and a denoising autoencoder (DAE) was trained to learn a low-dimensional representation of the connectivity matrices. This representation was studied via correlation and classification analysis, which revealed ability in detecting dyslexic subjects with an accuracy higher than 0.8, and balanced accuracy around 0.7. Some features of the DAE representation were significantly correlated ([Formula: see text]) with children's performance in language and cognitive tasks of the phonological hypothesis category such as phonological awareness and rapid symbolic naming, as well as reading efficiency and reading comprehension. Finally, a deeper analysis of the adjacency matrix revealed a reduced bilateral connection between electrodes of the temporal lobe (roughly the primary auditory cortex) in DD subjects, as well as an increased connectivity of the F7 electrode, placed roughly on Broca's area. These results pave the way for a complementary assessment of dyslexia using more objective methodologies such as EEG.
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Affiliation(s)
- Francisco J Martinez-Murcia
- Department of Communications Engineering, University of Malaga, Malaga, Spain.,DaSCI Andalusian Institute of Data Science and Computational Intelligence, University of Granada, Granada, Spain
| | - Andres Ortiz
- Department of Communications Engineering, University of Malaga, Malaga, Spain.,DaSCI Andalusian Institute of Data Science and Computational Intelligence, University of Granada, Granada, Spain
| | - Juan Manuel Gorriz
- Department of Signal Processing, Networking and Communications, University of Granada, Granada, Spain.,DaSCI Andalusian Institute of Data Science and Computational Intelligence, University of Granada, Granada, Spain
| | - Javier Ramirez
- Department of Signal Processing, Networking and Communications, University of Granada, Granada, Spain.,DaSCI Andalusian Institute of Data Science and Computational Intelligence, University of Granada, Granada, Spain
| | | | - Miguel Lopez-Zamora
- Department of Evolutive Psychology and Education, University of Malaga, Malaga, Spain
| | - Juan Luis Luque
- Department of Evolutive Psychology and Education, University of Malaga, Malaga, Spain
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Poor neural and perceptual phoneme discrimination during acoustic variation in dyslexia. Sci Rep 2020; 10:8646. [PMID: 32457322 PMCID: PMC7250843 DOI: 10.1038/s41598-020-65490-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 05/04/2020] [Indexed: 12/30/2022] Open
Abstract
Whereas natural acoustic variation in speech does not compromise phoneme discrimination in healthy adults, it was hypothesized to be a challenge for developmental dyslexics. We investigated dyslexics’ neural and perceptual discrimination of native language phonemes during acoustic variation. Dyslexics and non-dyslexics heard /æ/ and /i/ phonemes in a context with fo variation and then in a context without it. Mismatch negativity (MMN) and P3a responses to phoneme changes were recorded with electroencephalogram to compare groups during ignore and attentive listening. Perceptual phoneme discrimination in the variable context was evaluated with hit-ratios and reaction times. MMN/N2bs were diminished in dyslexics in the variable context. Hit-ratios were smaller in dyslexics than controls. MMNs did not differ between groups in the context without variation. These results suggest that even distinctive vowels are challenging to discriminate for dyslexics when the context resembles natural variability of speech. This most likely reflects poor categorical perception of phonemes in dyslexics. Difficulties to detect linguistically relevant invariant information during acoustic variation in speech may contribute to dyslexics’ deficits in forming native language phoneme representations during infancy. Future studies should acknowledge that simple experimental paradigms with repetitive stimuli can be insensitive to dyslexics’ speech processing deficits.
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Rasamimanana M, Barbaroux M, Colé P, Besson M. Semantic compensation and novel word learning in university students with dyslexia. Neuropsychologia 2020; 139:107358. [DOI: 10.1016/j.neuropsychologia.2020.107358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 12/12/2019] [Accepted: 01/20/2020] [Indexed: 01/11/2023]
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Vasilyeva MJ, Knyazeva VM, Aleksandrov AA, Shtyrov Y. Neurophysiological Correlates of Fast Mapping of Novel Words in the Adult Brain. Front Hum Neurosci 2019; 13:304. [PMID: 31607876 PMCID: PMC6761327 DOI: 10.3389/fnhum.2019.00304] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 08/15/2019] [Indexed: 12/02/2022] Open
Abstract
Word acquisition could be mediated by the neurocognitive mechanism known as fast mapping (FM). It refers to a process of incidental exclusion-based learning and is believed to be a critical mechanism for the rapid build-up of lexicon, although its neural mechanisms are still poorly understood. To investigate the neural bases of this key learning skill, we used event-related potentials (ERPs) and employed an audio-visual paradigm that included a counterbalanced set of familiar and novel spoken word forms presented, in a single exposure, in conjunction with novel and familiar images. To define learning-related brain dynamics, passive auditory ERPs, known to index long-term memory trace activation, were recorded before and after the FM task. Following the single FM learning exposure, we found a significant enhancement in neural activation elicited by the newly trained word form, which was expressed at ~200-400 ms after the word onset. No similar amplitude increase was found either for the native familiar word used as a control stimulus in the same learning paradigm or for similar control stimuli which were not subject to training. Topographic analysis suggested a left-lateral shift of the ERP scalp distribution for the novel FM word form, underpinned by fronto-temporal cortical sources, which may indicate the involvement of pre-existing neurolinguistic networks for mastering new word forms with native phonology. Overall, the near-instant changes in neural activity after a single-shot novel word training indicate that FM could promote rapid integration of newly learned items into the brain's neural lexicon, even in adulthood.
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Affiliation(s)
- Marina J. Vasilyeva
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
- Laboratory of Behavioral Neurodynamics, Saint Petersburg State University, Saint Petersburg, Russia
| | - Veronika M. Knyazeva
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
- Laboratory of Behavioral Neurodynamics, Saint Petersburg State University, Saint Petersburg, Russia
| | - Aleksander A. Aleksandrov
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
- Laboratory of Behavioral Neurodynamics, Saint Petersburg State University, Saint Petersburg, Russia
| | - Yury Shtyrov
- Laboratory of Behavioral Neurodynamics, Saint Petersburg State University, Saint Petersburg, Russia
- Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark
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Frey A, François C, Chobert J, Velay JL, Habib M, Besson M. Music Training Positively Influences the Preattentive Perception of Voice Onset Time in Children with Dyslexia: A Longitudinal Study. Brain Sci 2019; 9:brainsci9040091. [PMID: 31010099 PMCID: PMC6523730 DOI: 10.3390/brainsci9040091] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/12/2019] [Accepted: 04/13/2019] [Indexed: 12/04/2022] Open
Abstract
Previous results showed a positive influence of music training on linguistic abilities at both attentive and preattentive levels. Here, we investigate whether six months of active music training is more efficient than painting training to improve the preattentive processing of phonological parameters based on durations that are often impaired in children with developmental dyslexia (DD). Results were also compared to a control group of Typically Developing (TD) children matched on reading age. We used a Test–Training–Retest procedure and analysed the Mismatch Negativity (MMN) and the N1 and N250 components of the Event-Related Potentials to syllables that differed in Voice Onset Time (VOT), vowel duration, and vowel frequency. Results were clear-cut in showing a normalization of the preattentive processing of VOT in children with DD after music training but not after painting training. They also revealed increased N250 amplitude to duration deviant stimuli in children with DD after music but not painting training, and no training effect on the preattentive processing of frequency. These findings are discussed in view of recent theories of dyslexia pointing to deficits in processing the temporal structure of speech. They clearly encourage the use of active music training for the rehabilitation of children with language impairments.
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Affiliation(s)
- Aline Frey
- ESPE de l'académie de Créteil, Université Paris-Est Créteil, Laboratoire CHArt, 94380 Bonneuil-sur-Marne, France.
| | - Clément François
- Laboratoire Parole et Langage, CNRS et Aix Marseille Université, 13640 Aix-en-Provence, France.
- Cognition and Brain Plasticity Group, IDIBELL, University of Barcelona, 08193 Barcelona, Spain.
| | - Julie Chobert
- Laboratoire de Neurosciences Cognitives, CNRS et Aix-Marseille Université, 13331 Marseille, France.
| | - Jean-Luc Velay
- Laboratoire de Neurosciences Cognitives, CNRS et Aix-Marseille Université, 13331 Marseille, France.
| | - Michel Habib
- Département de Neurologie Pédiatrique, CHU Timone, 13005 Marseille, France.
| | - Mireille Besson
- Laboratoire de Neurosciences Cognitives, CNRS et Aix-Marseille Université, 13331 Marseille, France.
- Cuban Neuroscience Center, La Havane 4850, Cuba.
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Diminished brain responses to second-language words are linked with native-language literacy skills in dyslexia. Neuropsychologia 2019; 122:105-115. [DOI: 10.1016/j.neuropsychologia.2018.11.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 11/02/2018] [Accepted: 11/07/2018] [Indexed: 11/18/2022]
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