1
|
Freschl J, Azizi LA, Balboa L, Kaldy Z, Blaser E. The development of peak alpha frequency from infancy to adolescence and its role in visual temporal processing: A meta-analysis. Dev Cogn Neurosci 2022; 57:101146. [PMID: 35973361 PMCID: PMC9399966 DOI: 10.1016/j.dcn.2022.101146] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 07/21/2022] [Accepted: 08/08/2022] [Indexed: 01/19/2023] Open
Abstract
While it has been shown that alpha frequency increases over development (Stroganova et al., 1999), a precise trajectory has not yet been specified, making it challenging to constrain theories linking alpha rhythms to perceptual development. We conducted a comprehensive review of studies measuring resting-state occipital peak alpha frequency (PAF, the frequency exhibiting maximum power) from birth to 18 years of age. From 889 potentially relevant studies, we identified 40 reporting PAF (109 samples; 3882 subjects). A nonlinear regression revealed that PAF increases quickly in early childhood (from 6.1 Hz at 6 months to 8.4 Hz at 5 years) and levels off in adolescence (9.7 Hz at 13 years), with an asymptote at 10.1 Hz. We found no effect of resting state procedure (eyes-open versus eyes-closed) or biological sex. PAF has been implicated as a clock on visual temporal processing, with faster frequencies associated with higher visual temporal resolution. Psychophysical studies have shown that temporal resolution reaches adult levels by 5 years of age (Freschl et al., 2019, 2020). The fact that PAF reaches the adult range of 8-12 Hz by that age strengthens the link between PAF and temporal resolution.
Collapse
Affiliation(s)
- Julie Freschl
- University of Massachusetts Boston, Boston, MA, USA; Smith-Kettlewell Eye Research Institute, San Francisco, CA, USA.
| | | | | | - Zsuzsa Kaldy
- University of Massachusetts Boston, Boston, MA, USA
| | - Erik Blaser
- University of Massachusetts Boston, Boston, MA, USA
| |
Collapse
|
2
|
Jakovljević T, Janković MM, Savić AM, Soldatović I, Mačužić I, Jakulin TJ, Papa G, Ković V. The effect of colour on reading performance in children, measured by a sensor hub: From the perspective of gender. PLoS One 2021; 16:e0252622. [PMID: 34125863 PMCID: PMC8202909 DOI: 10.1371/journal.pone.0252622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/19/2021] [Indexed: 11/18/2022] Open
Abstract
In recent decades reported findings regarding gender differences in reading achievement, cognitive abilities and maturation process in boys and girls are conflicting. As reading is one of the most important processes in the maturation of an individual, the aim of the study was to better understand gender differences between primary school students. The study evaluates differences in Heart Rate Variability (HRV), Electroencephalography (EEG), Electrodermal Activities (EDA) and eye movement of participants during the reading task. Taking into account that colour may affect reading skills, in that it affects the emotional and physiological state of the body, the research attempts to provide a better understanding of gender differences in reading through examining the effect of colour, as applied to reading content. The physiological responses of 50 children (25 boys and 25 girls) to 12 different background and overlay colours of reading content were measured and summarised during the reading process. Our findings show that boys have shorter reading duration scores and a longer Saccade Count, Saccade Duration Total, and Saccade Duration Average when reading on a coloured background, especially purple, which could be caused by their motivation and by the type of reading task. Also, the boys had higher values for the Delta band and the Whole Range of EEG measurements in comparison to the girls when reading on coloured backgrounds, which could reflect the faster maturation of the girls. Regarding EDA measurements we did not find systematic differences between groups either on white or on coloured/overlay background. We found the most significant differences arose in the HRV parameters, namely (SDNN (ms), STD HR (beats/min), RMSSD (ms), NN50 (beats), pNN50 (%), CVRR) when children read the text on coloured/overlay backgrounds, where the girls showed systematically higher values on HRV measurements in comparison to the boys, mostly with yellow, red, and orange overlay colours.
Collapse
Affiliation(s)
- Tamara Jakovljević
- Sensor Technologies, Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
| | - Milica M. Janković
- School of Electrical Engineering, University of Belgrade, Belgrade, Serbia
| | - Andrej M. Savić
- School of Electrical Engineering, University of Belgrade, Belgrade, Serbia
| | - Ivan Soldatović
- Institute of Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Ivan Mačužić
- Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia
| | | | | | - Vanja Ković
- Laboratory for Neurocognition and Applied Cognition, Faculty of Philosophy, University of Belgrade, Belgrade, Serbia
| |
Collapse
|
3
|
Shanok NA, Reive C, Mize KD, Jones NA. Mindfulness Meditation Intervention Alters Neurophysiological Symptoms of Anxiety and Depression in Preadolescents. J PSYCHOPHYSIOL 2020. [DOI: 10.1027/0269-8803/a000244] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract. Mindfulness meditation interventions (MMIs) are formal training programs which utilize mindfulness techniques to improve attentional control and reduce stress and anxiety. Past investigations have shown that mindfulness-based interventions are effective in improving symptoms of anxiety and depression in both adolescents and adults, making this a promising natural approach to treating mood disorders. The current study sought to examine the neurophysiological effects of a 10-week MMI, in a relatively unexplored age-range (7–10 years). The non-clinical participants demonstrated increases in interhemispheric alpha coherence, as well as increased theta, alpha, and beta power particularly in frontal and central areas; reflecting a lower neurological risk for anxiety development. However, two common measures linked to anxiety, frontal and posterior alpha asymmetry remained largely unchanged following the training period. Still, these preliminary results exemplify the potentially positive effects of mindfulness meditation on preadolescents; this time on neurophysiological functioning.
Collapse
Affiliation(s)
- Nathaniel A. Shanok
- Developmental Neuroscience Lab, Charles E. Schmidt College of Science, Florida Atlantic University, Boca Raton, FL, USA
| | - Carol Reive
- Christine E. Lynn College of Nursing, Florida Atlantic University, Boca Raton, FL, USA
| | - Krystal D. Mize
- Developmental Neuroscience Lab, Charles E. Schmidt College of Science, Florida Atlantic University, Boca Raton, FL, USA
| | - Nancy Aaron Jones
- Developmental Neuroscience Lab, Charles E. Schmidt College of Science, Florida Atlantic University, Boca Raton, FL, USA
| |
Collapse
|
4
|
Gartstein MA, Hancock GR, Potapova NV, Calkins SD, Bell MA. Modeling development of frontal electroencephalogram (EEG) asymmetry: Sex differences and links with temperament. Dev Sci 2020; 23:e12891. [PMID: 31359565 PMCID: PMC6893078 DOI: 10.1111/desc.12891] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 05/08/2019] [Indexed: 12/17/2022]
Abstract
Asymmetric patterns of frontal brain electrical activity reflect approach and avoidance tendencies, with stability of relative right activation associated with withdrawal emotions/motivation and left hemisphere activation linked with approach and positive affect. However, considerable shifts in approach/avoidance-related lateralization have been reported for children not targeted because of extreme temperament. In this study, dynamic effects of frontal electroencephalogram (EEG) power within and across hemispheres were examined throughout early childhood. Specifically, EEG indicators at 5, 10, 24, 36, 48, and 72 months-of-age (n = 410) were analyzed via a hybrid of difference score and panel design models, with baseline measures and subsequent time-to-time differences modeled as potentially influencing all subsequent amounts of time-to-time change (i.e., predictively saturated). Infant sex was considered as a moderator of dynamic developmental effects, with temperament attributes measured at 5 months examined as predictors of EEG hemisphere development. Overall, change in left and right frontal EEG power predicted declining subsequent change in the same hemisphere, with effects on the opposing neurobehavioral system enhancing later growth. Infant sex moderated the pattern of within and across-hemisphere effects, wherein for girls more prominent left hemisphere influences on the right hemisphere EEG changes were noted and right hemisphere effects were more salient for boys. Largely similar patterns of temperament prediction were observed for the left and the right EEG power changes, with limited sex differences in links between temperament and growth parameters. Results were interpreted in the context of comparable analyses using parietal power values, which provided evidence for unique frontal effects.
Collapse
Affiliation(s)
- Maria A Gartstein
- Department of Psychology, Washington State University, Pullman, WA, USA
| | - Gregory R Hancock
- Department of Human Development and Quantitative Methodology, Measurement, Statistics and Evaluation (EDMS), College Park, MD, USA
| | | | - Susan D Calkins
- Department of Psychology, Human Development and Family Studies, Greensboro, NC, USA
| | | |
Collapse
|
5
|
Cheng KS, Han RP, Lee PF. Neurophysiological study on the effect of various short durations of deep breathing: A randomized controlled trial. Respir Physiol Neurobiol 2018; 249:23-31. [DOI: 10.1016/j.resp.2017.12.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 12/17/2017] [Accepted: 12/28/2017] [Indexed: 12/17/2022]
|
6
|
Wen DJ, Soe NN, Sim LW, Sanmugam S, Kwek K, Chong YS, Gluckman PD, Meaney MJ, Rifkin-Graboi A, Qiu A. Infant frontal EEG asymmetry in relation with postnatal maternal depression and parenting behavior. Transl Psychiatry 2017; 7:e1057. [PMID: 28291259 PMCID: PMC5416671 DOI: 10.1038/tp.2017.28] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/10/2017] [Accepted: 01/16/2017] [Indexed: 12/18/2022] Open
Abstract
Right frontal electroencephalogram (EEG) asymmetry associates with negative affect and depressed mood, which, among children, are predicted by maternal depression and poor parenting. This study examined associations of maternal depression and maternal sensitivity with infant frontal EEG asymmetry based on 111 mother-6-month-infant dyads. There were no significant effects of postnatal maternal depression or maternal sensitivity, or their interaction, on infant EEG frontal asymmetry. However, in a subsample for which the infant spent at least 50% of his/her day time hours with his/her mother, both lower maternal sensitivity and higher maternal depression predicted greater relative right frontal EEG asymmetry. Our study further showed that greater relative right frontal EEG asymmetry of 6-month-old infants predicted their greater negative emotionality at 12 months of age. Our study suggested that among infants with sufficient postnatal maternal exposure, both maternal sensitivity and mental health are important influences on early brain development.
Collapse
Affiliation(s)
- D J Wen
- Department of Biomedical Engineering, Clinical Imaging Research Center, National University of Singapore, Singapore, Singapore
| | - N N Soe
- Department of Biomedical Engineering, Clinical Imaging Research Center, National University of Singapore, Singapore, Singapore
| | - L W Sim
- Singapore Institute for Clinical Sciences, Singapore, Singapore
| | - S Sanmugam
- Singapore Institute for Clinical Sciences, Singapore, Singapore
| | - K Kwek
- KK Women's and Children's Hospital, Singapore, Singapore
| | - Y-S Chong
- Singapore Institute for Clinical Sciences, Singapore, Singapore
- Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - P D Gluckman
- Singapore Institute for Clinical Sciences, Singapore, Singapore
| | - M J Meaney
- Singapore Institute for Clinical Sciences, Singapore, Singapore
- Ludmer Centre for Neuroinformatics and Mental Health, Douglas Mental Health University Institute, McGill University, Montréal, QC, Canada
- Sackler Program for Epigenetics & Psychobiology, McGill University, Montréal, QC, Canada
| | - A Rifkin-Graboi
- Singapore Institute for Clinical Sciences, Singapore, Singapore
| | - A Qiu
- Department of Biomedical Engineering, Clinical Imaging Research Center, National University of Singapore, Singapore, Singapore
- Singapore Institute for Clinical Sciences, Singapore, Singapore
| |
Collapse
|
7
|
Müller BC, Kühn‐Popp N, Meinhardt J, Sodian B, Paulus M. Long‐term stability in children's frontal EEG alpha asymmetry between 14‐months and 83‐months. Int J Dev Neurosci 2015; 41:110-4. [DOI: 10.1016/j.ijdevneu.2015.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 01/23/2015] [Accepted: 01/23/2015] [Indexed: 11/26/2022] Open
Affiliation(s)
- Barbara C.N. Müller
- Behavioural Science InstituteRadboud University NijmegenThe Netherlands
- Ludwig‐Maximilian University MunichGermany
| | | | | | | | | |
Collapse
|
8
|
Mihajlovic V, Grundlehner B, Vullers R, Penders J. Wearable, Wireless EEG Solutions in Daily Life Applications: What are we Missing? IEEE J Biomed Health Inform 2015; 19:6-21. [DOI: 10.1109/jbhi.2014.2328317] [Citation(s) in RCA: 179] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
9
|
Langrová J, Kremláček J, Kuba M, Kubová Z, Szanyi J. Gender impact on electrophysiological activity of the brain. Physiol Res 2013; 61:S119-27. [PMID: 23130897 DOI: 10.33549/physiolres.932421] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Gender is presumed to be one of the factors causing interindividual variability in the brain's electrophysiological parameters. Our aim was to characterize the role of gender in visual evoked potentials (VEPs), event-related potentials (ERPs), visual mismatch negativity (vMMN) and the spectral characteristics of the EEG. We examined 42 healthy volunteers (21 women and 21 men, aged 20-29 years). We measured VEPs in response to pattern-reversal and motion-onset stimulation, ERPs in an oddball paradigm and vMMN in response to a combination of motion directions presented in the visual periphery. P100 peak latency for 40' reversal VEPs was significantly shorter in women than in men as determined using a non-parametric Wilcoxon signed-rank test. In addition, women showed higher relative EEG spectral power in the alpha band (p=0.023) and lower power in the theta band (p=0.004). Our results in this small but homogeneous group of subjects confirm previously reported gender influences on pattern-reversal VEPs and the EEG frequency spectrum. Gender should be taken into consideration in establishing norms on these measures. We found no statistically significant differences between women and men for any of the other stimuli presented.
Collapse
Affiliation(s)
- J Langrová
- Department of Pathophysiology, Faculty of Medicine in Hradec Králové, Charles University in Prague, Hradec Králové, Czech Republic.
| | | | | | | | | |
Collapse
|
10
|
Cragg L, Kovacevic N, McIntosh AR, Poulsen C, Martinu K, Leonard G, Paus T. Maturation of EEG power spectra in early adolescence: a longitudinal study. Dev Sci 2011; 14:935-43. [PMID: 21884309 DOI: 10.1111/j.1467-7687.2010.01031.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lucy Cragg
- School of Psychology, University of Nottingham, UK.
| | | | | | | | | | | | | |
Collapse
|
11
|
Gmehlin D, Thomas C, Weisbrod M, Walther S, Pfüller U, Resch F, Oelkers‐Ax R. Individual analysis of EEG background‐activity within school age: impact of age and sex within a longitudinal data set. Int J Dev Neurosci 2010; 29:163-70. [DOI: 10.1016/j.ijdevneu.2010.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 11/12/2010] [Accepted: 11/29/2010] [Indexed: 11/30/2022] Open
Affiliation(s)
- Dennis Gmehlin
- Section of Experimental Psychopathology and Neurophysiology, Department of PsychiatryUniversity of HeidelbergVoss‐Straße 469115HeidelbergGermany
| | - Christine Thomas
- Section of Experimental Psychopathology and Neurophysiology, Department of PsychiatryUniversity of HeidelbergVoss‐Straße 469115HeidelbergGermany
- Department of Geriatric PsychiatryCentre of Psychiatry and Psychotherapy, Ev. Hospital Bielefeld‐BethelGermany
| | - Matthias Weisbrod
- Section of Experimental Psychopathology and Neurophysiology, Department of PsychiatryUniversity of HeidelbergVoss‐Straße 469115HeidelbergGermany
- Psychiatric DepartmentSRH Clinical CentreKarlsbad‐LangensteinbachGermany
| | - Stephan Walther
- Section of Experimental Psychopathology and Neurophysiology, Department of PsychiatryUniversity of HeidelbergVoss‐Straße 469115HeidelbergGermany
| | - Ute Pfüller
- Section of Experimental Psychopathology and Neurophysiology, Department of PsychiatryUniversity of HeidelbergVoss‐Straße 469115HeidelbergGermany
- Psychiatric DepartmentSRH Clinical CentreKarlsbad‐LangensteinbachGermany
| | - Franz Resch
- Department of Child and Adolescent PsychiatryUniversity of HeidelbergGermany
| | - Rieke Oelkers‐Ax
- Section of Experimental Psychopathology and Neurophysiology, Department of PsychiatryUniversity of HeidelbergVoss‐Straße 469115HeidelbergGermany
- Department of Child and Adolescent PsychiatryUniversity of HeidelbergGermany
| |
Collapse
|
12
|
Vuga M, Fox NA, Cohn JF, Kovacs M, George CJ. Long-term stability of electroencephalographic asymmetry and power in 3 to 9 year-old children. Int J Psychophysiol 2007; 67:70-7. [PMID: 18045715 DOI: 10.1016/j.ijpsycho.2007.10.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2007] [Revised: 10/18/2007] [Accepted: 10/18/2007] [Indexed: 10/22/2022]
Abstract
We investigated the test-retest stability of resting EEG asymmetry and power in the alpha frequency range across a 0.6- to 3-year interval in 125 children (57 girls and 68 boys) for two age groups, 87 preschool children (3 to 5 year-olds) and 38 school-age children (6 to 9 year-olds). Children were from families with a parent's history of unipolar or bipolar depression (36 girls and 43 boys) or control families with no parent history of depression nor any other psychiatric disorder (21 girls and 25 boys). Frontal EEG asymmetry stability was low to moderate; intraclass correlations ranged from zero to 0.48 in the eyes-open condition, and from 0.19 to 0.45 in the eyes-closed condition. Also, parietal EEG asymmetry was low to moderate; intraclass correlations ranged from 0.21 to 0.52 in the eyes-open condition and from 0.27 to 0.72 in the eyes-closed condition. Stability of EEG asymmetry was not related to age, sex of the child, or parent's history of mood disorder. Frontal and parietal EEG power appeared moderately to highly stable. Intraclass correlations were between 0.65 and 0.86 in the eyes-open condition and between 0.52 and 0.90 in the eyes-closed condition. Although stability of EEG power was not statistical significantly different between preschool and school-age children, it consistently showed higher stability values in school-age children than in preschool children. Stability in school-age children approached values as has been reported for adults. The findings provide partial support to the concept of frontal EEG asymmetry as a trait marker in childhood.
Collapse
Affiliation(s)
- Marike Vuga
- Department of Epidemiology, University of Pittsburgh, 127 Parran Hall, 130 Desoto Street, Pittsburgh, PA 15213, USA.
| | | | | | | | | |
Collapse
|
13
|
Zietsch BP, Hansen JL, Hansell NK, Geffen GM, Martin NG, Wright MJ. Common and specific genetic influences on EEG power bands delta, theta, alpha, and beta. Biol Psychol 2007; 75:154-64. [PMID: 17316957 DOI: 10.1016/j.biopsycho.2007.01.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2006] [Revised: 01/18/2007] [Accepted: 01/18/2007] [Indexed: 10/23/2022]
Abstract
It is difficult to study the genetic basis of psychological function/dysfunction due to its etiological complexity. Instead, we studied a biological marker, EEG power, which is associated with various psychological phenotypes and is closer to gene function. Previous studies have consistently demonstrated high heritability of EEG band power, but less is known about how common or specific genes influence each power band. For 519 adolescent twin pairs, spectral powers were calculated for delta, theta, alpha, and beta bands at bilateral occipital and frontal sites. All four bands were entered into a multivariate genetic model, with occipital and frontal sites modelled separately. Variance was decomposed into additive (A) and dominant (D) genetic factors, and common (C) and unique (E) environmental factors. Band heritabilities were higher at occipital (0.75-0.86) than frontal sites (0.46-0.80). Both common and specific genetic factors influenced the bands, with common genetic and specific genetic factors having more influence in the occipital and frontal regions, respectively. Non-additive genetic effects on beta power and a common environment effect on delta, theta, and alpha powers were observed in the frontal region.
Collapse
|
14
|
Rowe DL, Robinson PA, Rennie CJ. Estimation of neurophysiological parameters from the waking EEG using a biophysical model of brain dynamics. J Theor Biol 2004; 231:413-33. [PMID: 15501472 DOI: 10.1016/j.jtbi.2004.07.004] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2003] [Revised: 06/22/2004] [Accepted: 07/12/2004] [Indexed: 11/20/2022]
Abstract
This paper presents the results from using electroencephalographic (EEG) data to estimate the values of key neurophysiological parameters using a detailed biophysical model of brain activity. The model incorporates spatial and temporal aspects of cortical function including axonal transmission delays, synapto-dendritic rates, range-dependent connectivities, excitatory and inhibitory neural populations, and intrathalamic, intracortical, corticocortical and corticothalamic pathways. Parameter estimates were obtained by fitting the model's theoretical spectrum to EEG spectra from each of 100 healthy human subjects. Statistical analysis was used to infer significant parameter variations occurring between eyes-closed and eyes-open states, and a correlation matrix was used to investigate links between the parameter variations and traditional measures of quantitative EEG (qEEG). Accurate fits to all experimental spectra were observed, and both inter-subject and between-state variability were accounted for by the variance in the fitted biophysical parameters, which were in turn consistent with known independent experimental and theoretical estimates. These values thus provide physiological information regarding the state. transitions (eyes-closed vs. eyes-open) and phenomena including cortical idling and alpha desynchronization. The parameters are also consistent with traditional qEEG, but are more informative, since they provide links to underlying physiological processes. To our knowledge, this is the first study where a detailed biophysical model of the brain is used to estimate neurophysiological parameters underlying the transitions in a broad range (0.25-50 Hz) of EEG spectra obtained from a large set of human data.
Collapse
Affiliation(s)
- Donald L Rowe
- School of Physics, University of Sydney, New South Wales 2006, Australia.
| | | | | |
Collapse
|
15
|
Fonseca LC, Tedrus GMAS, Martins SMV, Gibert MAP, Antunes Td TDA, Laloni DT. Eletrencefalograma quantitativo em escolares sadios: análise de frequências. ARQUIVOS DE NEURO-PSIQUIATRIA 2003; 61:796-801. [PMID: 14595486 DOI: 10.1590/s0004-282x2003000500018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abordaram-se, quantitativamente, parâmetros do eletrencefalograma e suas relações com idade, sexo e fatores sócio-educacionais. Foram estudadas 162 crianças de 7 a 11 anos de idade sem problemas neurológicos, psiquiátricos ou déficit cognitivo em testes psicométricos. Foram submetidas a entrevista, exame clínico-neurológico, teste de Matrizes Progressivas de Raven, Teste de Desempenho Escolar e eletrencefalograma quantitativo durante a vigília, em repouso. Observou-se, com a idade, diminuição das potências absoluta e relativa das faixas delta e teta assim como aumento da potência relativa alfa 2. Tais achados são semelhantes aos de outras populações da Europa, Ásia e América do Norte. Observou-se, ainda, que as potências absolutas delta e, especialmente, alfa foram maiores nas crianças com melhor desempenho no Teste de Desempenho Escolar, de modo independente da idade e do sexo da criança e da escolaridade materna. Não houve diferenças significativas da atividade elétrica cerebral segundo o sexo da criança e a escolaridade das mães.
Collapse
Affiliation(s)
- Lineu C Fonseca
- Faculdade de Medicina, Pontifícia Universidade Católica de Campinas, Campinas, Brasil.
| | | | | | | | | | | |
Collapse
|
16
|
Ristanović D, Martinović Z, Jovanović-Cupić V. [Topography and asymmetry of the visual response in electroencephalographic power spectra in healthy children]. SRP ARK CELOK LEK 2002; 130:13-8. [PMID: 12073282 DOI: 10.2298/sarh0202013r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
In order to quantify the visual reactivity of EEG to opening the eyes, the topography of EEG power spectra in a sample of 72 healthy subjects aged from 7-15 years, was studied. The EEGs were recorder at 14 scalp sites under eyes closed (ECL) and eyes open (EOP). It has been established that the absolute powers in total and in alpha band were significantly higher in all derivations under ECL as compared with EOP condition. Except for the frontal derivations, absolute power in theta band under ECL condition was significantly higher than that under EOP condition. Changes in delta and beta powers were seldom significant. In beta 2 band no EEG blocking was noticed in anterior area. Opening the eyes significantly influenced the values of asymmetry index in alpha band and total power. In all frequency bands and under both conditions, the differences of powers between the hemispheres were found mainly in the prefrontal and laterofrontal areas. The results showed that the visual blocking of EEG was mostly due to a higher degree of EEG desynchronization after opening the eyes.
Collapse
|
17
|
Abstract
In order to quantify the visual reactivity of EEG to opening the eyes, the topography of EEG power spectra for a sample of 72 healthy subjects of age ranging from 7 to 15 years was investigated. The EEGs were recorded from 16 scalp sites with eyes open (EOP) and eyes closed (ECL). Ln-transformed absolute EEG powers, acquired under these two states, were tested with Wilcoxon's paired test for differences between the powers. The absolute powers in alpha band and in total, were significantly higher in all derivations, under the ECL, as compared with the EOP, condition. Absolute powers in theta band under the ECL condition were also significantly higher than those under the EOP condition, except for frontal derivations. Changes in delta power were insignificant. Beta 1 band activity, when eyes were closed, was maximal in posterior and minimal in anterior derivations. When the eyes were open, the greatest beta 1 power was found in the frontal derivations. Beta 2 was the only band in which a frequent increase in power took place with eyes opening. Eyes opening appeared to decrease significantly, the beta 1 and beta 2 powers only in posterior derivations. The results showed that the visual blocking of EEG was mostly due to a higher degree of EEG desynchronization for the subjects aged 7-5 years.
Collapse
Affiliation(s)
- D Ristanović
- Department of Biophysics, School of Medicine, University of Belgrade, Serbia, Yugoslavia
| | | | | |
Collapse
|