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Granados Barbero R, de Vos A, Ghesquière P, Wouters J. Atypical processing in neural source analysis of speech envelope modulations in adolescents with dyslexia. Eur J Neurosci 2021; 54:7839-7859. [PMID: 34730259 DOI: 10.1111/ejn.15515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 10/01/2021] [Accepted: 10/28/2021] [Indexed: 11/28/2022]
Abstract
Different studies have suggested that language and developmental disorders such as dyslexia are associated with a disturbance of auditory entrainment and of the functional hemispheric asymmetries during speech processing. These disorders typically result from an issue in the phonological component of language that causes problems to represent and manipulate the phonological structure of words at the syllable and/or phoneme level. We used Auditory Steady-State Responses (ASSRs) in EEG recordings to investigate the brain activation and hemisphere asymmetry of theta, alpha, beta and low-gamma range oscillations in typical readers and readers with dyslexia. The aim was to analyse whether the group differences found in previous electrode level studies were caused by a different source activation pattern or conversely was an effect that could be found on the active brain sources. We could not find differences in the brain locations of the main active brain sources. However, we observed differences in the extracted waveforms. The group average of the first DSS component of all signal-to-noise ratios of ASSR at source level was higher than the group averages at the electrode level. These analyses included a lower alpha synchronisation in adolescents with dyslexia and the possibility of compensatory mechanisms in theta, beta and low-gamma frequency bands. The main brain auditory sources were located in cortical regions around the auditory cortex. Thus, the differences observed in auditory EEG experiments would, according to our findings, have their origin in the intrinsic oscillatory mechanisms of the brain cortical sources related to speech perception.
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Affiliation(s)
- Raúl Granados Barbero
- Research Group Experimental ORL, Department of Neurosciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Astrid de Vos
- Research Group Experimental ORL, Department of Neurosciences, KU Leuven - University of Leuven, Leuven, Belgium.,Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Pol Ghesquière
- Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Jan Wouters
- Research Group Experimental ORL, Department of Neurosciences, KU Leuven - University of Leuven, Leuven, Belgium
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Mazaheri A, Slagter HA, Thut G, Foxe JJ. Orchestration of brain oscillations: principles and functions. Eur J Neurosci 2019; 48:2385-2388. [PMID: 30276895 DOI: 10.1111/ejn.14189] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ali Mazaheri
- Centre for Human Brain Health, School of Psychology, University of Birmingham, Birmingham, UK
| | - Heleen A Slagter
- Department of Psychology, University of Amsterdam, Amsterdam, The Netherlands
| | - Gregor Thut
- Centre for Cognitive Neuroimaging, Institute of Neuroscience and Psychology, University of Glasgow, Glasgow, UK
| | - John J Foxe
- Department of Neuroscience, The Ernest J. Del Monte Institute for Neuroscience, School of Medicine and Dentistry, University of Rochester, Rochester, New York, USA
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3
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Thornton D, Harkrider AW, Jenson D, Saltuklaroglu T. Sensorimotor activity measured via oscillations of EEG mu rhythms in speech and non-speech discrimination tasks with and without segmentation demands. BRAIN AND LANGUAGE 2018; 187:62-73. [PMID: 28431691 DOI: 10.1016/j.bandl.2017.03.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 01/24/2017] [Accepted: 03/31/2017] [Indexed: 06/07/2023]
Abstract
Better understanding of the role of sensorimotor processing in speech and non-speech segmentation can be achieved with more temporally precise measures. Twenty adults made same/different discriminations of speech and non-speech stimuli pairs, with and without segmentation demands. Independent component analysis of 64-channel EEG data revealed clear sensorimotor mu components, with characteristic alpha and beta peaks, localized to premotor regions in 70% of participants.Time-frequency analyses of mu components from accurate trials showed that (1) segmentation tasks elicited greater event-related synchronization immediately following offset of the first stimulus, suggestive of inhibitory activity; (2) strong late event-related desynchronization in all conditions, suggesting that working memory/covert replay contributed substantially to sensorimotor activity in all conditions; (3) stronger beta desynchronization in speech versus non-speech stimuli during stimulus presentation, suggesting stronger auditory-motor transforms for speech versus non-speech stimuli. Findings support the continued use of oscillatory approaches for helping understand segmentation and other cognitive tasks.
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Affiliation(s)
- David Thornton
- University of Tennessee Health Science Center, United States.
| | | | - David Jenson
- University of Tennessee Health Science Center, United States
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Heyselaar E, Mazaheri A, Hagoort P, Segaert K. Changes in alpha activity reveal that social opinion modulates attention allocation during face processing. Neuroimage 2018; 174:432-440. [PMID: 29578028 DOI: 10.1016/j.neuroimage.2018.03.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 02/23/2018] [Accepted: 03/17/2018] [Indexed: 10/17/2022] Open
Abstract
Participants' performance differs when conducting a task in the presence of a secondary individual, moreover the opinion the participant has of this individual also plays a role. Using EEG, we investigated how previous interactions with, and evaluations of, an avatar in virtual reality subsequently influenced attentional allocation to the face of that avatar. We focused on changes in the alpha activity as an index of attentional allocation. We found that the onset of an avatar's face whom the participant had developed a rapport with induced greater alpha suppression. This suggests greater attentional resources are allocated to the interacted-with avatars. The evaluative ratings of the avatar induced a U-shaped change in alpha suppression, such that participants paid most attention when the avatar was rated as average. These results suggest that attentional allocation is an important element of how behaviour is altered in the presence of a secondary individual and is modulated by our opinion of that individual.
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Affiliation(s)
- Evelien Heyselaar
- Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.
| | - Ali Mazaheri
- School of Psychology, University of Birmingham, Birmingham, United Kingdom; Centre for Human Brain Health, University of Birmingham, Birmingham, United Kingdom
| | - Peter Hagoort
- Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - Katrien Segaert
- School of Psychology, University of Birmingham, Birmingham, United Kingdom; Centre for Human Brain Health, University of Birmingham, Birmingham, United Kingdom
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De Vos A, Vanvooren S, Vanderauwera J, Ghesquière P, Wouters J. Atypical neural synchronization to speech envelope modulations in dyslexia. BRAIN AND LANGUAGE 2017; 164:106-117. [PMID: 27833037 DOI: 10.1016/j.bandl.2016.10.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 09/06/2016] [Accepted: 10/19/2016] [Indexed: 05/13/2023]
Abstract
A fundamental deficit in the synchronization of neural oscillations to temporal information in speech could underlie phonological processing problems in dyslexia. In this study, the hypothesis of a neural synchronization impairment is investigated more specifically as a function of different neural oscillatory bands and temporal information rates in speech. Auditory steady-state responses to 4, 10, 20 and 40Hz modulations were recorded in normal reading and dyslexic adolescents to measure neural synchronization of theta, alpha, beta and low-gamma oscillations to syllabic and phonemic rate information. In comparison to normal readers, dyslexic readers showed reduced non-synchronized theta activity, reduced synchronized alpha activity and enhanced synchronized beta activity. Positive correlations between alpha synchronization and phonological skills were found in normal readers, but were absent in dyslexic readers. In contrast, dyslexic readers exhibited positive correlations between beta synchronization and phonological skills. Together, these results suggest that auditory neural synchronization of alpha and beta oscillations is atypical in dyslexia, indicating deviant neural processing of both syllabic and phonemic rate information. Impaired synchronization of alpha oscillations in particular demonstrated to be the most prominent neural anomaly possibly hampering speech and phonological processing in dyslexic readers.
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Affiliation(s)
- Astrid De Vos
- Research Group Experimental ORL, Department of Neurosciences, KU Leuven - University of Leuven, Herestraat 49 Box 721, 3000 Leuven, Belgium; Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven - University of Leuven, Leopold Vanderkelenstraat 32 Box 3765, 3000 Leuven, Belgium.
| | - Sophie Vanvooren
- Research Group Experimental ORL, Department of Neurosciences, KU Leuven - University of Leuven, Herestraat 49 Box 721, 3000 Leuven, Belgium; Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven - University of Leuven, Leopold Vanderkelenstraat 32 Box 3765, 3000 Leuven, Belgium
| | - Jolijn Vanderauwera
- Research Group Experimental ORL, Department of Neurosciences, KU Leuven - University of Leuven, Herestraat 49 Box 721, 3000 Leuven, Belgium; Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven - University of Leuven, Leopold Vanderkelenstraat 32 Box 3765, 3000 Leuven, Belgium
| | - Pol Ghesquière
- Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven - University of Leuven, Leopold Vanderkelenstraat 32 Box 3765, 3000 Leuven, Belgium
| | - Jan Wouters
- Research Group Experimental ORL, Department of Neurosciences, KU Leuven - University of Leuven, Herestraat 49 Box 721, 3000 Leuven, Belgium
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Kösem A, Basirat A, Azizi L, van Wassenhove V. High-frequency neural activity predicts word parsing in ambiguous speech streams. J Neurophysiol 2016; 116:2497-2512. [PMID: 27605528 DOI: 10.1152/jn.00074.2016] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 09/03/2016] [Indexed: 11/22/2022] Open
Abstract
During speech listening, the brain parses a continuous acoustic stream of information into computational units (e.g., syllables or words) necessary for speech comprehension. Recent neuroscientific hypotheses have proposed that neural oscillations contribute to speech parsing, but whether they do so on the basis of acoustic cues (bottom-up acoustic parsing) or as a function of available linguistic representations (top-down linguistic parsing) is unknown. In this magnetoencephalography study, we contrasted acoustic and linguistic parsing using bistable speech sequences. While listening to the speech sequences, participants were asked to maintain one of the two possible speech percepts through volitional control. We predicted that the tracking of speech dynamics by neural oscillations would not only follow the acoustic properties but also shift in time according to the participant's conscious speech percept. Our results show that the latency of high-frequency activity (specifically, beta and gamma bands) varied as a function of the perceptual report. In contrast, the phase of low-frequency oscillations was not strongly affected by top-down control. Whereas changes in low-frequency neural oscillations were compatible with the encoding of prelexical segmentation cues, high-frequency activity specifically informed on an individual's conscious speech percept.
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Affiliation(s)
- Anne Kösem
- Cognitive Neuroimaging Unit, CEA DRF/I2BM, Institut National de la Santé et de la Recherche Médicale, Université Paris-Sud, Université Paris-Saclay, Gif/Yvette, France; .,Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands.,Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands; and
| | - Anahita Basirat
- Cognitive Neuroimaging Unit, CEA DRF/I2BM, Institut National de la Santé et de la Recherche Médicale, Université Paris-Sud, Université Paris-Saclay, Gif/Yvette, France.,SCALab, Centre National de la Recherche Scientifique UMR 9193, Université Lille, Lille, France
| | - Leila Azizi
- Cognitive Neuroimaging Unit, CEA DRF/I2BM, Institut National de la Santé et de la Recherche Médicale, Université Paris-Sud, Université Paris-Saclay, Gif/Yvette, France
| | - Virginie van Wassenhove
- Cognitive Neuroimaging Unit, CEA DRF/I2BM, Institut National de la Santé et de la Recherche Médicale, Université Paris-Sud, Université Paris-Saclay, Gif/Yvette, France
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Bhat J, Miller LM, Pitt MA, Shahin AJ. Putative mechanisms mediating tolerance for audiovisual stimulus onset asynchrony. J Neurophysiol 2015; 113:1437-50. [PMID: 25505102 DOI: 10.1152/jn.00200.2014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Audiovisual (AV) speech perception is robust to temporal asynchronies between visual and auditory stimuli. We investigated the neural mechanisms that facilitate tolerance for audiovisual stimulus onset asynchrony (AVOA) with EEG. Individuals were presented with AV words that were asynchronous in onsets of voice and mouth movement and judged whether they were synchronous or not. Behaviorally, individuals tolerated (perceived as synchronous) longer AVOAs when mouth movement preceded the speech (V-A) stimuli than when the speech preceded mouth movement (A-V). Neurophysiologically, the P1-N1-P2 auditory evoked potentials (AEPs), time-locked to sound onsets and known to arise in and surrounding the primary auditory cortex (PAC), were smaller for the in-sync than the out-of-sync percepts. Spectral power of oscillatory activity in the beta band (14–30 Hz) following the AEPs was larger during the in-sync than out-of-sync perception for both A-V and V-A conditions. However, alpha power (8–14 Hz), also following AEPs, was larger for the in-sync than out-of-sync percepts only in the V-A condition. These results demonstrate that AVOA tolerance is enhanced by inhibiting low-level auditory activity (e.g., AEPs representing generators in and surrounding PAC) that code for acoustic onsets. By reducing sensitivity to acoustic onsets, visual-to-auditory onset mapping is weakened, allowing for greater AVOA tolerance. In contrast, beta and alpha results suggest the involvement of higher-level neural processes that may code for language cues (phonetic, lexical), selective attention, and binding of AV percepts, allowing for wider neural windows of temporal integration, i.e., greater AVOA tolerance.
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Affiliation(s)
- Jyoti Bhat
- Department of Otolaryngology—Head and Neck Surgery, The Ohio State University, College of Medicine, Columbus, Ohio
| | - Lee M. Miller
- Center for Mind and Brain, University of California, Davis, California
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, California; and
| | - Mark A. Pitt
- Department of Psychology, The Ohio State University, Columbus, Ohio
| | - Antoine J. Shahin
- Department of Otolaryngology—Head and Neck Surgery, The Ohio State University, College of Medicine, Columbus, Ohio
- Center for Mind and Brain, University of California, Davis, California
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Attention to memory: orienting attention to sound object representations. PSYCHOLOGICAL RESEARCH 2013; 78:439-52. [PMID: 24352689 DOI: 10.1007/s00426-013-0531-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 11/29/2013] [Indexed: 01/08/2023]
Abstract
Despite a growing acceptance that attention and memory interact, and that attention can be focused on an active internal mental representation (i.e., reflective attention), there has been a paucity of work focusing on reflective attention to 'sound objects' (i.e., mental representations of actual sound sources in the environment). Further research on the dynamic interactions between auditory attention and memory, as well as its degree of neuroplasticity, is important for understanding how sound objects are represented, maintained, and accessed in the brain. This knowledge can then guide the development of training programs to help individuals with attention and memory problems. This review article focuses on attention to memory with an emphasis on behavioral and neuroimaging studies that have begun to explore the mechanisms that mediate reflective attentional orienting in vision and more recently, in audition. Reflective attention refers to situations in which attention is oriented toward internal representations rather than focused on external stimuli. We propose four general principles underlying attention to short-term memory. Furthermore, we suggest that mechanisms involved in orienting attention to visual object representations may also apply for orienting attention to sound object representations.
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