198 recherche sur le mot-clé 'EEG-frequency-band'

Source localization of brain electric field frequency bands during conscious, spontaneous, visual imagery and abstract thought / D. LEHMANN in Cognitive Brain Research, 1-4 (December 1993)

Public ISBD [article]  inCognitive Brain Research > 1-4 (December 1993) . - p.203-210 Titre : Source localization of brain electric field frequency bands during conscious, spontaneous, visual imagery and abstract thought Type de document : texte imprimé Auteurs : D. LEHMANN, Auteur ; B. HENGGELER, Auteur ; M. KOUKKOU, Auteur ; C.M. MICHEL, Auteur Année de publication : 1993 Article en page(s) : p.203-210 Langues : Anglais (eng) Mots-clés : Source-localization EEG-frequency-band Mentation-class Consciousness Spontaneous-thought Visual-imagery Index. décimale : PER Périodiques Résumé : This paper addresses the issue of mind-brain correspondence, using a novel way to reduce brain electric field data in the frequency domain to estimates of intracerebral model source locations, and applying this method to brain electric data collected during the 2-s epochs immediately before the randomly solicited reports of spontaneous, conscious, covert experiences from 12 normal volunteers. The mentation reports were classified into visual imagery and abstract thought. The mean locations of the EEG model sources associated with abstract thoughts were generally more anterior and deeper than those of visual imagery, particularly significant for the delta/theta band; the finding was common across subjects. Thus, different brain functional states involving different geometries of activated neural populations exist during conscious, spontaneous, task-free mentations of the visual imagery type and of the abstract thought type. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=781 [article] Source localization of brain electric field frequency bands during conscious, spontaneous, visual imagery and abstract thought [texte imprimé] / D. LEHMANN, Auteur ; B. HENGGELER, Auteur ; M. KOUKKOU, Auteur ; C.M. MICHEL, Auteur . - 1993 . - p.203-210. Langues : Anglais (eng) in Cognitive Brain Research > 1-4 (December 1993) . - p.203-210 Mots-clés : Source-localization EEG-frequency-band Mentation-class Consciousness Spontaneous-thought Visual-imagery Index. décimale : PER Périodiques Résumé : This paper addresses the issue of mind-brain correspondence, using a novel way to reduce brain electric field data in the frequency domain to estimates of intracerebral model source locations, and applying this method to brain electric data collected during the 2-s epochs immediately before the randomly solicited reports of spontaneous, conscious, covert experiences from 12 normal volunteers. The mentation reports were classified into visual imagery and abstract thought. The mean locations of the EEG model sources associated with abstract thoughts were generally more anterior and deeper than those of visual imagery, particularly significant for the delta/theta band; the finding was common across subjects. Thus, different brain functional states involving different geometries of activated neural populations exist during conscious, spontaneous, task-free mentations of the visual imagery type and of the abstract thought type. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=781

Annotation: Neurofeedback – train your brain to train behaviour / Hartmut HEINRICH in Journal of Child Psychology and Psychiatry, 48-1 (January 2007)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 48-1 (January 2007) . - p.3–16 Titre : Annotation: Neurofeedback – train your brain to train behaviour Type de document : texte imprimé Auteurs : Hartmut HEINRICH, Auteur ; Holger GEVENSLEBEN, Auteur ; Ute STREHL, Auteur Année de publication : 2007 Article en page(s) : p.3–16 Langues : Anglais (eng) Mots-clés : Neurofeedback electroencephalogram-(EEG) frequency-bands slow-cortical-potentials-(SCPs) attention-deficit-hyperactivity-disorder-(ADHD) epilepsy self-regulation Index. décimale : PER Périodiques Résumé : Neurofeedback (NF) is a form of behavioural training aimed at developing skills for self-regulation of brain activity. Within the past decade, several NF studies have been published that tend to overcome the methodological shortcomings of earlier studies. This annotation describes the methodical basis of NF and reviews the evidence base for its clinical efficacy and effectiveness in neuropsychiatric disorders. Methods: In NF training, self-regulation of specific aspects of electrical brain activity is acquired by means of immediate feedback and positive reinforcement. In frequency training, activity in different EEG frequency bands has to be decreased or increased. Training of slow cortical potentials (SCPs) addresses the regulation of cortical excitability. Results: NF studies revealed paradigm-specific effects on, e.g., attention and memory processes and performance improvements in real-life conditions, in healthy subjects as well as in patients. In several studies it was shown that children with attention-deficit hyperactivity disorder (ADHD) improved behavioural and cognitive variables after frequency (e.g., theta/beta) training or SCP training. Neurophysiological effects could also be measured. However, specific and unspecific training effects could not be disentangled in these studies. For drug-resistant patients with epilepsy, significant and long-lasting decreases of seizure frequency and intensity through SCP training were documented in a series of studies. For other child psychiatric disorders (e.g., tic disorders, anxiety, and autism) only preliminary investigations are available. Conclusions: There is growing evidence for NF as a valuable treatment module in neuropsychiatric disorders. Further, controlled studies are necessary to establish clinical efficacy and effectiveness and to learn more about the mechanisms underlying successful training. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2006.01665.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=925 [article] Annotation: Neurofeedback – train your brain to train behaviour [texte imprimé] / Hartmut HEINRICH, Auteur ; Holger GEVENSLEBEN, Auteur ; Ute STREHL, Auteur . - 2007 . - p.3–16. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 48-1 (January 2007) . - p.3–16 Mots-clés : Neurofeedback electroencephalogram-(EEG) frequency-bands slow-cortical-potentials-(SCPs) attention-deficit-hyperactivity-disorder-(ADHD) epilepsy self-regulation Index. décimale : PER Périodiques Résumé : Neurofeedback (NF) is a form of behavioural training aimed at developing skills for self-regulation of brain activity. Within the past decade, several NF studies have been published that tend to overcome the methodological shortcomings of earlier studies. This annotation describes the methodical basis of NF and reviews the evidence base for its clinical efficacy and effectiveness in neuropsychiatric disorders. Methods: In NF training, self-regulation of specific aspects of electrical brain activity is acquired by means of immediate feedback and positive reinforcement. In frequency training, activity in different EEG frequency bands has to be decreased or increased. Training of slow cortical potentials (SCPs) addresses the regulation of cortical excitability. Results: NF studies revealed paradigm-specific effects on, e.g., attention and memory processes and performance improvements in real-life conditions, in healthy subjects as well as in patients. In several studies it was shown that children with attention-deficit hyperactivity disorder (ADHD) improved behavioural and cognitive variables after frequency (e.g., theta/beta) training or SCP training. Neurophysiological effects could also be measured. However, specific and unspecific training effects could not be disentangled in these studies. For drug-resistant patients with epilepsy, significant and long-lasting decreases of seizure frequency and intensity through SCP training were documented in a series of studies. For other child psychiatric disorders (e.g., tic disorders, anxiety, and autism) only preliminary investigations are available. Conclusions: There is growing evidence for NF as a valuable treatment module in neuropsychiatric disorders. Further, controlled studies are necessary to establish clinical efficacy and effectiveness and to learn more about the mechanisms underlying successful training. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2006.01665.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=925

EEG spectral characteristics and asymmetry in pre-school children with autism in awake and sleep stages / Sowmyashree Mayur KAKU ; Anoop JOSEPH ; Manjula William JAMES ; Gosala R.K. SARMA ; Ashok MYSORE ; Shyam Sundar RAJAGOPALAN in Research in Autism, 121-122 (March-April 2025)  

Public ISBD [article]  inResearch in Autism > 121-122 (March-April 2025) . - 202538 Titre : EEG spectral characteristics and asymmetry in pre-school children with autism in awake and sleep stages Type de document : texte imprimé Auteurs : Sowmyashree Mayur KAKU, Auteur ; Anoop JOSEPH, Auteur ; Manjula William JAMES, Auteur ; Gosala R.K. SARMA, Auteur ; Ashok MYSORE, Auteur ; Shyam Sundar RAJAGOPALAN, Auteur Article en page(s) : 202538 Langues : Anglais (eng) Mots-clés : Autism  Preschool  Electroencephalogram  EEG  NREM  Sleep stage  Asymmetry  Power spectral density  Band power Index. décimale : PER Périodiques Résumé : Background Autism spectrum disorder (ASD) is a complex-heterogeneous neurodevelopmental disorder manifesting as abnormalities in social communication and repetitive behaviors, generally observed from early childhood. These syndromic behaviors have neurophysiological basis which stems from altered activations of cortical structures in the pathways of functional neural networks and regulatory mechanisms. Frequency bands of Electroencephalography (EEG) have functional and topographical significance expressed through computed parameters like band power and asymmetry index. Previous studies have mapped these parameters to ASD symptoms, limited to select cortical locations, bands and restricted study conditions in either passive awake or selected sleep stage. Methods Spontaneous EEG recorded from two clinically diagnosed groups of preschoolers, ASD and non-ASD in awake and 3 stages of Non-Rapid Eye Movement (NREM) sleep (N1-N3) was decomposed into 8 frequency bands spanning 0.5-24 Hz. Band powers were computed for 60 channels and hemispheric asymmetry index (AI) for 12 regions covering the entire scalp. Results We found awake alpha with N1 slow and fast theta powers significantly lower for ASD. N1 fast beta power was higher in ASD. Sleep AI exhibited significant dominance with both groups displaying congruent orientation in N1 and contralateral in N2 and N3. ASD showed lower AI in N1 and N3 with higher AI in N2. Conclusion Cyclical states of awake and sleep often tend to project their mental processes from one onto another making a use case for our pervasive approach. This pilot study highlights the need to include EEG spectral parameters into the heterogeneous relationship of awake/sleep states mentation, neuropsychology and ASD symptoms. En ligne : https://doi.org/10.1016/j.reia.2025.202538 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=555 [article] EEG spectral characteristics and asymmetry in pre-school children with autism in awake and sleep stages [texte imprimé] / Sowmyashree Mayur KAKU, Auteur ; Anoop JOSEPH, Auteur ; Manjula William JAMES, Auteur ; Gosala R.K. SARMA, Auteur ; Ashok MYSORE, Auteur ; Shyam Sundar RAJAGOPALAN, Auteur . - 202538. Langues : Anglais (eng) in Research in Autism > 121-122 (March-April 2025) . - 202538 Mots-clés : Autism  Preschool  Electroencephalogram  EEG  NREM  Sleep stage  Asymmetry  Power spectral density  Band power Index. décimale : PER Périodiques Résumé : Background Autism spectrum disorder (ASD) is a complex-heterogeneous neurodevelopmental disorder manifesting as abnormalities in social communication and repetitive behaviors, generally observed from early childhood. These syndromic behaviors have neurophysiological basis which stems from altered activations of cortical structures in the pathways of functional neural networks and regulatory mechanisms. Frequency bands of Electroencephalography (EEG) have functional and topographical significance expressed through computed parameters like band power and asymmetry index. Previous studies have mapped these parameters to ASD symptoms, limited to select cortical locations, bands and restricted study conditions in either passive awake or selected sleep stage. Methods Spontaneous EEG recorded from two clinically diagnosed groups of preschoolers, ASD and non-ASD in awake and 3 stages of Non-Rapid Eye Movement (NREM) sleep (N1-N3) was decomposed into 8 frequency bands spanning 0.5-24 Hz. Band powers were computed for 60 channels and hemispheric asymmetry index (AI) for 12 regions covering the entire scalp. Results We found awake alpha with N1 slow and fast theta powers significantly lower for ASD. N1 fast beta power was higher in ASD. Sleep AI exhibited significant dominance with both groups displaying congruent orientation in N1 and contralateral in N2 and N3. ASD showed lower AI in N1 and N3 with higher AI in N2. Conclusion Cyclical states of awake and sleep often tend to project their mental processes from one onto another making a use case for our pervasive approach. This pilot study highlights the need to include EEG spectral parameters into the heterogeneous relationship of awake/sleep states mentation, neuropsychology and ASD symptoms. En ligne : https://doi.org/10.1016/j.reia.2025.202538 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=555

Physical and neurophysiological maturation associated with ADHD among previously institutionalized children: a randomized controlled trial / Anne B. ARNETT in Journal of Child Psychology and Psychiatry, 66-7 (July 2025)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 66-7 (July 2025) . - p.967-979 Titre : Physical and neurophysiological maturation associated with ADHD among previously institutionalized children: a randomized controlled trial Type de document : texte imprimé Auteurs : Anne B. ARNETT, Auteur ; Martín ANTÚNEZ, Auteur ; Charles ZEANAH, Auteur ; Nathan A. FOX, Auteur ; Charles A. NELSON, Auteur Article en page(s) : p.967-979 Langues : Anglais (eng) Mots-clés : Neurodevelopment  EEG  Bucharest Early Intervention Project  growth trajectory  peak alpha frequency  theta-beta ratio Index. décimale : PER Périodiques Résumé : Background Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental outcome among children with a history of early institutional care. Prior research on institutionalized children suggested that accelerated physical growth in childhood is a risk factor for ADHD outcomes. Methods The current study examined physical and neurophysiological growth trajectories among institutionalized children randomized to foster care treatment (n 59) or care as usual (n 54), and never institutionalized children (n 64) enrolled in the Bucharest Early Intervention Project (NCT00747396, clinicaltrials.gov). Participants completed physical and electroencephalography (EEG) assessments at six time points from infancy through adolescence, as well as structured diagnostic interviews at the 54-month and 12-year time points. A series of multilevel growth models and cross-lagged path models were estimated to examine associations among physical and neurophysiological maturation, treatment group, age of foster care placement, and ADHD diagnostic outcomes. Results Twenty-seven percent of the institutionalized children met research criteria for ADHD at one or both time points. Slowed, prolonged growth of height and head circumference were associated with both ADHD and delayed foster care placement. Placement in foster care versus care as usual, but not ADHD, was associated with maturation of the peak alpha frequency. Among children randomized to foster care, average theta-beta ratio was lower among those with ADHD. There was no evidence that rapid physical maturation led to atypical cortical activity. Conclusions Delayed, prolonged physical growth and atypical neurophysiology from infancy through adolescence is associated with ADHD among institutionalized children, over and above the protective effects of foster care. En ligne : https://doi.org/10.1111/jcpp.14110 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=562 [article] Physical and neurophysiological maturation associated with ADHD among previously institutionalized children: a randomized controlled trial [texte imprimé] / Anne B. ARNETT, Auteur ; Martín ANTÚNEZ, Auteur ; Charles ZEANAH, Auteur ; Nathan A. FOX, Auteur ; Charles A. NELSON, Auteur . - p.967-979. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 66-7 (July 2025) . - p.967-979 Mots-clés : Neurodevelopment  EEG  Bucharest Early Intervention Project  growth trajectory  peak alpha frequency  theta-beta ratio Index. décimale : PER Périodiques Résumé : Background Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental outcome among children with a history of early institutional care. Prior research on institutionalized children suggested that accelerated physical growth in childhood is a risk factor for ADHD outcomes. Methods The current study examined physical and neurophysiological growth trajectories among institutionalized children randomized to foster care treatment (n 59) or care as usual (n 54), and never institutionalized children (n 64) enrolled in the Bucharest Early Intervention Project (NCT00747396, clinicaltrials.gov). Participants completed physical and electroencephalography (EEG) assessments at six time points from infancy through adolescence, as well as structured diagnostic interviews at the 54-month and 12-year time points. A series of multilevel growth models and cross-lagged path models were estimated to examine associations among physical and neurophysiological maturation, treatment group, age of foster care placement, and ADHD diagnostic outcomes. Results Twenty-seven percent of the institutionalized children met research criteria for ADHD at one or both time points. Slowed, prolonged growth of height and head circumference were associated with both ADHD and delayed foster care placement. Placement in foster care versus care as usual, but not ADHD, was associated with maturation of the peak alpha frequency. Among children randomized to foster care, average theta-beta ratio was lower among those with ADHD. There was no evidence that rapid physical maturation led to atypical cortical activity. Conclusions Delayed, prolonged physical growth and atypical neurophysiology from infancy through adolescence is associated with ADHD among institutionalized children, over and above the protective effects of foster care. En ligne : https://doi.org/10.1111/jcpp.14110 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=562

A resting EEG study of neocortical hyperexcitability and altered functional connectivity in fragile X syndrome / Jing WANG in Journal of Neurodevelopmental Disorders, 9-1 (December 2017)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 9-1 (December 2017) . - p.11 Titre : A resting EEG study of neocortical hyperexcitability and altered functional connectivity in fragile X syndrome Type de document : texte imprimé Auteurs : Jing WANG, Auteur ; Lauren E ETHRIDGE, Auteur ; Matthew W. MOSCONI, Auteur ; Stormi P. WHITE, Auteur ; Devin K. BINDER, Auteur ; Ernest V. PEDAPATI, Auteur ; Craig ERICKSON, Auteur ; Matthew J. BYERLY, Auteur ; John A. SWEENEY, Auteur Article en page(s) : p.11 Langues : Anglais (eng) Mots-clés : Cross-frequency coupling  Eeg  Fragile X syndrome  Gamma  Hyperexcitability  Top-down modulation Index. décimale : PER Périodiques Résumé : BACKGROUND: Cortical hyperexcitability due to abnormal fast-spiking inhibitory interneuron function has been documented in fmr1 KO mice, a mouse model of the fragile X syndrome which is the most common single gene cause of autism and intellectual disability. METHODS: We collected resting state dense-array electroencephalography data from 21 fragile X syndrome (FXS) patients and 21 age-matched healthy participants. RESULTS: FXS patients exhibited greater gamma frequency band power, which was correlated with social and sensory processing difficulties. Second, FXS patients showed increased spatial spreading of phase-synchronized high frequency neural activity in the gamma band. Third, we observed increased negative theta-to-gamma but decreased alpha-to-gamma band amplitude coupling, and the level of increased theta power was inversely related to the level of resting gamma power in FXS. CONCLUSIONS: Increased theta band power and coupling from frontal sources may represent a mechanism providing compensatory inhibition of high-frequency gamma band activity, potentially contributing to the widely varying level of neurophysiological and behavioral abnormalities and treatment response seen in full-mutation FXS patients. These findings extend preclinical observations and provide new mechanistic insights into brain alterations and their variability across FXS patients. Electrophysiological measures may provide useful translational biomarkers for advancing drug development and individualizing treatments for neurodevelopmental disorders with associated neuronal hyperexcitability. En ligne : http://dx.doi.org/10.1186/s11689-017-9191-z Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=350 [article] A resting EEG study of neocortical hyperexcitability and altered functional connectivity in fragile X syndrome [texte imprimé] / Jing WANG, Auteur ; Lauren E ETHRIDGE, Auteur ; Matthew W. MOSCONI, Auteur ; Stormi P. WHITE, Auteur ; Devin K. BINDER, Auteur ; Ernest V. PEDAPATI, Auteur ; Craig ERICKSON, Auteur ; Matthew J. BYERLY, Auteur ; John A. SWEENEY, Auteur . - p.11. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 9-1 (December 2017) . - p.11 Mots-clés : Cross-frequency coupling  Eeg  Fragile X syndrome  Gamma  Hyperexcitability  Top-down modulation Index. décimale : PER Périodiques Résumé : BACKGROUND: Cortical hyperexcitability due to abnormal fast-spiking inhibitory interneuron function has been documented in fmr1 KO mice, a mouse model of the fragile X syndrome which is the most common single gene cause of autism and intellectual disability. METHODS: We collected resting state dense-array electroencephalography data from 21 fragile X syndrome (FXS) patients and 21 age-matched healthy participants. RESULTS: FXS patients exhibited greater gamma frequency band power, which was correlated with social and sensory processing difficulties. Second, FXS patients showed increased spatial spreading of phase-synchronized high frequency neural activity in the gamma band. Third, we observed increased negative theta-to-gamma but decreased alpha-to-gamma band amplitude coupling, and the level of increased theta power was inversely related to the level of resting gamma power in FXS. CONCLUSIONS: Increased theta band power and coupling from frontal sources may represent a mechanism providing compensatory inhibition of high-frequency gamma band activity, potentially contributing to the widely varying level of neurophysiological and behavioral abnormalities and treatment response seen in full-mutation FXS patients. These findings extend preclinical observations and provide new mechanistic insights into brain alterations and their variability across FXS patients. Electrophysiological measures may provide useful translational biomarkers for advancing drug development and individualizing treatments for neurodevelopmental disorders with associated neuronal hyperexcitability. En ligne : http://dx.doi.org/10.1186/s11689-017-9191-z Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=350

Shared genetic influences on ADHD symptoms and very low-frequency EEG activity: a twin study / Charlotte TYE in Journal of Child Psychology and Psychiatry, 53-6 (June 2012)  

Permalink

Shifted phase of EEG cross-frequency coupling in individuals with Phelan-McDermid syndrome / Michael G. MARISCAL in Molecular Autism, 12 (2021)  

Permalink

Social orienting in prematurely born preschoolers: a case control study showing altered neural tuning towards voices, not faces / Rowena VAN DEN BROECK in Molecular Autism, 16 (2025)  

Permalink

Specific EEG resting state biomarkers in FXS and ASD / Mélodie PROTEAU-LEMIEUX in Journal of Neurodevelopmental Disorders, 16 (2024)  

Permalink

Voluntary attention in Asperger's syndrome: Brain electrical oscillation and phase-synchronization during facial emotion recognition / Yi-Li TSENG in Research in Autism Spectrum Disorders, 13-14 (May 2015)  

Permalink