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	Provedor de dados BJMBR (3) Autor Lazarev,V.V. (2) Azevedo,L.C. de (1) Infantosi,A.F.C. (1) Koch,H.J. (1) Raschka,C. (1) Rau,R. (1) Schubsky,B.M. (1) Simpson,D.M. (1) Valencio-de-Campos,D. (1) deAzevedo,L.C. (1) Mais... Palavra-chave Intermittent photic stimulation (3) Adolescents (2) Children (2) Electroencephalogram (2) Photic driving (2) Brain mapping (1) Brain topography (1) EEG (1) Global field power ratios (1) Harmonic (1) IPS (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2004 (1) 2002 (1) 2001 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Photic driving in the electroencephalogram of children and adolescents: harmonic structure and relation to the resting state BJMBR Lazarev,V.V.; Simpson,D.M.; Schubsky,B.M.; deAzevedo,L.C.. In order to identify latent bioelectrical oscillators, 15 normal subjects (aged 9-17 years, 8 males, 7 females) were subjected to intermittent photic stimulation. The EEG amplitude spectra corresponding to the 11 fixed frequencies of stimulation presented (3-24 Hz) were combined to form "profiles" of the driving reaction in the right occipital area. The driving response varied with frequency, and was demonstrable in 70-100% of cases (using as criterion peak amplitudes 20% larger than those of the neighbors). The strongest responses were observed at the frequency closest to the alpha peak of the resting EEG. A secondary profile maximum was in the theta band. In 10 subjects, this maximum exceeded half the alpha peak (with an average of 72.4% of the alpha... Tipo: Info:eu-repo/semantics/article Palavras-chave: Electroencephalogram; Intermittent photic stimulation; Photic driving; Harmonic; Children; Adolescents. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001001200010 Topographic aspects of photic driving in the electroencephalogram of children and adolescents BJMBR Lazarev,V.V.; Infantosi,A.F.C.; Valencio-de-Campos,D.; Azevedo,L.C. de. The electroencephalogram amplitude spectra at 11 fixed frequencies of intermittent photic stimulation of 3 to 24 Hz were combined into driving "profiles" for 14 scalp points in 8 male and 7 female normal subjects aged 9 to 17 years. The driving response varied over frequency and was detected in 70 to 100% of cases in the occipital areas (maximum) and in 27 to 77% of cases in the frontal areas (minimum) using as a criterion peak amplitude 20% higher than those of the neighbors. Each subject responded, on average, to 9.7 ± 1.15 intermittent photic stimulation frequencies in the right occipital area and to 6.8 ± 1.97 frequencies in the right frontal area. Most of the driving responses (in relation to the previous background) were significant according to the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Electroencephalogram; Intermittent photic stimulation; Photic driving; Brain topography; Children; Adolescents. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000600014 Uniform decrease of alpha-global field power induced by intermittent photic stimulation of healthy subjects BJMBR Rau,R.; Raschka,C.; Koch,H.J.. Nineteen-channel EEGs were recorded from the scalp surface of 30 healthy subjects (16 males and 14 females, mean age: 34 years, SD: 11.7 years) at rest and under trains of intermittent photic stimulation (IPS) at rates of 5, 10 and 20 Hz. Digitalized data were submitted to spectral analysis with fast fourier transformation providing the basis for the computation of global field power (GFP). For quantification, GFP values in the frequency ranges of 5, 10 and 20 Hz at rest were divided by the corresponding data obtained under IPS. All subjects showed a photic driving effect at each rate of stimulation. GFP data were normally distributed, whereas ratios from photic driving effect data showed no uniform behavior due to high interindividual variability.... Tipo: Info:eu-repo/semantics/article Palavras-chave: EEG; Brain mapping; Intermittent photic stimulation; IPS; Global field power ratios. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000500014 Registros recuperados: 3 Primeira ... 1 ... Última

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