Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEG
The aim of the present study was to explore auditory cortical oscillation properties in developmental dyslexia. We recorded cortical activity in 17 dyslexic participants and 15 matched controls using simultaneous EEG and fMRI during passive viewing of an audiovisual movie. We compared the distributi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2013-08-01
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| Series: | Frontiers in Human Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00454/full |
| _version_ | 1818504613801754624 |
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| author | Katia eLehongre Benjamin eMorillon Anne-Lise eGiraud Franck eRamus |
| author_facet | Katia eLehongre Benjamin eMorillon Anne-Lise eGiraud Franck eRamus |
| author_sort | Katia eLehongre |
| collection | DOAJ |
| description | The aim of the present study was to explore auditory cortical oscillation properties in developmental dyslexia. We recorded cortical activity in 17 dyslexic participants and 15 matched controls using simultaneous EEG and fMRI during passive viewing of an audiovisual movie. We compared the distribution of brain oscillations in the delta, theta and gamma ranges over left and right auditory cortices. In controls, our results are consistent with the hypothesis that there is a dominance of gamma oscillations in the left hemisphere and a dominance of delta-theta oscillations in the right hemisphere. In dyslexics, we did not find such an interaction, but similar oscillations in both hemispheres. Thus, our results confirm that the primary cortical disruption in dyslexia lies in a lack of hemispheric specialization for gamma oscillations, which might disrupt the representation of or the access to phonemic units. |
| first_indexed | 2024-12-10T21:39:28Z |
| format | Article |
| id | doaj.art-02fe3374f847451cae5058577111e569 |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-12-10T21:39:28Z |
| publishDate | 2013-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-02fe3374f847451cae5058577111e5692022-12-22T01:32:33ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612013-08-01710.3389/fnhum.2013.0045447533Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEGKatia eLehongre0Benjamin eMorillon1Anne-Lise eGiraud2Franck eRamus3Hôpital de la Pitié-SalpêtrièreColumbia University Medical CenterUniversity of GenevaEcole Normale Supérieure, EHESS, CNRSThe aim of the present study was to explore auditory cortical oscillation properties in developmental dyslexia. We recorded cortical activity in 17 dyslexic participants and 15 matched controls using simultaneous EEG and fMRI during passive viewing of an audiovisual movie. We compared the distribution of brain oscillations in the delta, theta and gamma ranges over left and right auditory cortices. In controls, our results are consistent with the hypothesis that there is a dominance of gamma oscillations in the left hemisphere and a dominance of delta-theta oscillations in the right hemisphere. In dyslexics, we did not find such an interaction, but similar oscillations in both hemispheres. Thus, our results confirm that the primary cortical disruption in dyslexia lies in a lack of hemispheric specialization for gamma oscillations, which might disrupt the representation of or the access to phonemic units.http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00454/fullDyslexiaEEG-fMRItheta oscillationdelta oscillationgamma oscillationauditory sampling |
| spellingShingle | Katia eLehongre Benjamin eMorillon Anne-Lise eGiraud Franck eRamus Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEG Frontiers in Human Neuroscience Dyslexia EEG-fMRI theta oscillation delta oscillation gamma oscillation auditory sampling |
| title | Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEG |
| title_full | Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEG |
| title_fullStr | Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEG |
| title_full_unstemmed | Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEG |
| title_short | Impaired auditory sampling in dyslexia: Further evidence from combined fMRI and EEG |
| title_sort | impaired auditory sampling in dyslexia further evidence from combined fmri and eeg |
| topic | Dyslexia EEG-fMRI theta oscillation delta oscillation gamma oscillation auditory sampling |
| url | http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00454/full |
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