Preservation of alpha rhythm shortly after photic driving

Sakamoto, H.; Inouye, Tetsuzo; Shinosaki, Kazuhiro

doi:10.3109/00207459308986673

Cited by 21 publications

(30 citation statements)

References 7 publications

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“…A high correlation between the driving profile and the background EEG spectra may be considered evidence of the above-mentioned concept of the resonance mechanisms of the driving response (4)(5)(6)(7)(8)(9)(10). This is most clearly illustrated by the maximum increase in amplitude occurring during stimulation near the peak alpha frequencies of the background EEG (3,5,35).…”

Section: Discussionmentioning

confidence: 86%

“…The digital sampling frequency was 256 Hz. The EEG was not digitized during at least 5 s after each stimulation in order to exclude a possible short post-stimulation effect (9).…”

Section: Methodsmentioning

confidence: 99%

“…The hypothesis of the resonance nature of the driving response was suggested as early as the nineteen forties (3) and later was accepted and experimentally confirmed by many investigators (4)(5)(6)(7)(8)(9)(10). On this basis, IPS has been used to test some basic neurophysiological mechanisms taking into account modern concepts of the organizing role of the bioelectrical rhythms in the brain (11,12).…”

Section: Introductionmentioning

confidence: 99%

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Photic driving in the electroencephalogram of children and adolescents: harmonic structure and relation to the resting state

Лазарев

Simpson

Schubsky

et al. 2001

Braz J Med Biol Res

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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 peak), while in the resting spectra, theta amplitudes were much lower than the alpha maxima. This responsiveness in theta activity seems to be characteristic of prepubertal and pubertal subjects. The profiles and resting EEG spectra showed a highly significant Pearson's correlation, with the peak in the theta band of the profiles being the main difference observed between them. The correlation coefficient was significantly correlated with the ratio of the maxima in the theta and alpha bands (R = -0.77, P<0.001). The correlation coefficient between profile and resting spectrum may be a useful indicator in screening methods used to reveal latent cerebral oscillators. Profiles for the second and third harmonics were correlated with those of the first harmonic (fundamental frequency), when considering the corresponding EEG frequencies. Peak frequencies in all three profiles were close to those of the individual's background alpha rhythm, and peak amplitudes in higher harmonics were not much lower than those of the fundamental frequency (mean values of 84 and 63%, for second and third harmonics, respectively).

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Section: Discussionmentioning

confidence: 86%

“…The digital sampling frequency was 256 Hz. The EEG was not digitized during at least 5 s after each stimulation in order to exclude a possible short post-stimulation effect (9).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photic driving in the electroencephalogram of children and adolescents: harmonic structure and relation to the resting state

Лазарев

Simpson

Schubsky

et al. 2001

Braz J Med Biol Res

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“…The instants of stimulation were also acquired to be used as reference when applying the signal processing techniques. In order to avoid the possible short post-stimulation effect (27), the first 5 s after each stimulation were excluded from analysis.…”

Section: Methodsmentioning

confidence: 99%

Topographic aspects of photic driving in the electroencephalogram of children and adolescents

Лазарев

Infantosi

Valencio-de-Campos

et al. 2004

Braz J Med Biol Res

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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 spectral F-test (α = 0.05), which also detected changes in some cases of low amplitude responses not revealed by the peak criterion. The profiles had two maxima in the alpha and theta bands in all leads. The latter was not present in the background spectra in the posterior areas and was less pronounced in the anterior ones. The weight of the profile theta maximum increased towards the frontal areas where the two maxima were similar, while the profile amplitudes decreased. The profiles repeated the shape of the background spectra, except for the theta band. The interhemispheric correlation between profiles was high. The theta driving detected in all areas recorded suggests a generalized influence of the theta generators in prepubertal and pubertal subjects.

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“…Photic driving is widely used as an activation method in clinical practice, for example, in epilepsy, migraine, schizophrenia or depression [4][5][6]. Basic properties of the alpha rhythm during photic driving have been investigated by electroencephalographic methods [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Alpha entrainment in human electroencephalogram and magnetoencephalogram recordings

Schwab¹,

Ligges²,

Jungmann³

et al. 2006

NeuroReport

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Visual stimulation by repetitive flashes of light can lead to an entrainment of the alpha rhythm in electroencephalogram recordings (also called photic driving). We report a comparison of simultaneously recorded electric and magnetic data in a photic driving experiment, adapted to the individual alpha rhythm of 10 healthy volunteers. We show that there is a stronger frequency entrainment in magnetoencephalogram than in electroencephalogram recordings in all volunteers, which indicates a possible tangential brain activity underlying the dominant entrainment effect. The entrainment in the magnetoencephalogram lasts over significantly more frequencies and is most effective in the region around the individual alpha and a half alpha. For different channels, we found different degrees of entrainment showing topological and time-varying properties.

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Preservation of alpha rhythm shortly after photic driving

Cited by 21 publications

References 7 publications

Photic driving in the electroencephalogram of children and adolescents: harmonic structure and relation to the resting state

Photic driving in the electroencephalogram of children and adolescents: harmonic structure and relation to the resting state

Topographic aspects of photic driving in the electroencephalogram of children and adolescents

Alpha entrainment in human electroencephalogram and magnetoencephalogram recordings

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