Altered brain network topology during speech tracking in developmental dyslexia
Developmental dyslexia is often accompanied by altered phonological processing of speech. Underlying neural changes have typically been characterized in terms of stimulus- and/or task-related responses within individual brain regions or their functional connectivity. Less is known about potential ch...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | NeuroImage |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1053811922002695 |
| _version_ | 1817993057532903424 |
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| author | Manli Zhang Lars Riecke Gorka Fraga-González Milene Bonte |
| author_facet | Manli Zhang Lars Riecke Gorka Fraga-González Milene Bonte |
| author_sort | Manli Zhang |
| collection | DOAJ |
| description | Developmental dyslexia is often accompanied by altered phonological processing of speech. Underlying neural changes have typically been characterized in terms of stimulus- and/or task-related responses within individual brain regions or their functional connectivity. Less is known about potential changes in the more global functional organization of brain networks. Here we recorded electroencephalography (EEG) in typical and dyslexic readers while they listened to (a) a random sequence of syllables and (b) a series of tri-syllabic real words. The network topology of the phase synchronization of evoked cortical oscillations was investigated in four frequency bands (delta, theta, alpha and beta) using minimum spanning tree graphs. We found that, compared to syllable tracking, word tracking triggered a shift toward a more integrated network topology in the theta band in both groups. Importantly, this change was significantly stronger in the dyslexic readers, who also showed increased reliance on a right frontal cluster of electrodes for word tracking. The current findings point towards an altered effect of word-level processing on the functional brain network organization that may be associated with less efficient phonological and reading skills in dyslexia. |
| first_indexed | 2024-04-14T01:34:42Z |
| format | Article |
| id | doaj.art-56087e5332094c26b2aad4e0445d07e5 |
| institution | Directory Open Access Journal |
| issn | 1095-9572 |
| language | English |
| last_indexed | 2024-04-14T01:34:42Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | NeuroImage |
| spelling | doaj.art-56087e5332094c26b2aad4e0445d07e52022-12-22T02:20:02ZengElsevierNeuroImage1095-95722022-07-01254119142Altered brain network topology during speech tracking in developmental dyslexiaManli Zhang0Lars Riecke1Gorka Fraga-González2Milene Bonte3Maastricht Brain Imaging Center, Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, P.O. Box 616, Maastricht, MD 6200, Netherlands; Corresponding author.Maastricht Brain Imaging Center, Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, P.O. Box 616, Maastricht, MD 6200, NetherlandsDepartment of Child and Adolescent Psychiatry, Faculty of Medicine, University of Zurich, SwitzerlandMaastricht Brain Imaging Center, Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, P.O. Box 616, Maastricht, MD 6200, NetherlandsDevelopmental dyslexia is often accompanied by altered phonological processing of speech. Underlying neural changes have typically been characterized in terms of stimulus- and/or task-related responses within individual brain regions or their functional connectivity. Less is known about potential changes in the more global functional organization of brain networks. Here we recorded electroencephalography (EEG) in typical and dyslexic readers while they listened to (a) a random sequence of syllables and (b) a series of tri-syllabic real words. The network topology of the phase synchronization of evoked cortical oscillations was investigated in four frequency bands (delta, theta, alpha and beta) using minimum spanning tree graphs. We found that, compared to syllable tracking, word tracking triggered a shift toward a more integrated network topology in the theta band in both groups. Importantly, this change was significantly stronger in the dyslexic readers, who also showed increased reliance on a right frontal cluster of electrodes for word tracking. The current findings point towards an altered effect of word-level processing on the functional brain network organization that may be associated with less efficient phonological and reading skills in dyslexia.http://www.sciencedirect.com/science/article/pii/S1053811922002695Developmental dyslexiaSpeech trackingElectroencephalography (EEG)Functional connectivityGraph theoryMinimum spanning tree |
| spellingShingle | Manli Zhang Lars Riecke Gorka Fraga-González Milene Bonte Altered brain network topology during speech tracking in developmental dyslexia NeuroImage Developmental dyslexia Speech tracking Electroencephalography (EEG) Functional connectivity Graph theory Minimum spanning tree |
| title | Altered brain network topology during speech tracking in developmental dyslexia |
| title_full | Altered brain network topology during speech tracking in developmental dyslexia |
| title_fullStr | Altered brain network topology during speech tracking in developmental dyslexia |
| title_full_unstemmed | Altered brain network topology during speech tracking in developmental dyslexia |
| title_short | Altered brain network topology during speech tracking in developmental dyslexia |
| title_sort | altered brain network topology during speech tracking in developmental dyslexia |
| topic | Developmental dyslexia Speech tracking Electroencephalography (EEG) Functional connectivity Graph theory Minimum spanning tree |
| url | http://www.sciencedirect.com/science/article/pii/S1053811922002695 |
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