Individual frequency profile of photic driving in children and adolescents
Individual frequency profile of photic driving in children and adolescents
In 15 normal subjects, individual "profiles" of the driving reaction to intermittent photic stimulation were calculated in 15 leads, by combining EEG amplitude spectra at 11 fixed frequencies (3-24 Hz), and their higher harmonics. This was compared to the resting EEG spectrum by Pearson's correlation (R). Driving was found in 70-100% of cases in the occipital and in 30-80% in central areas, when using as criterion peak amplitudes 20%
larger than those of the neighbours, with strongest responses in the alpha band, and a secondary maximum in the theta range. In the resting EEG, no theta maxima were observed. Theta maxima in profile negatively correlated with Rs between profile and resting EEG spectra. Profiles in the second and third harmonics were highly correlated with that in fundamental, when considering the corresponding frequencies of evoked EEG activity. The frequencies of the peaks in the three profiles were close to the individual's alpha rhythm, and peak amplitudes were comparable. The profile amplitudes,
and their Rs calculated against occipital profiles, decreased towards the fi'ontal
region, where the maxima in theta and alpha bands were similar. There was high interhemisphric correlation between profiles.
p.S38
Lazarev, V.V.
1c2a4d2f-705b-4671-8808-1f7d2f765912
Simpson, D.M.
53674880-f381-4cc9-8505-6a97eeac3c2a
2001
Lazarev, V.V.
1c2a4d2f-705b-4671-8808-1f7d2f765912
Simpson, D.M.
53674880-f381-4cc9-8505-6a97eeac3c2a
Lazarev, V.V. and Simpson, D.M.
(2001)
Individual frequency profile of photic driving in children and adolescents.
Clinical Neurophysiology, 112 (Supplement 1), .
(doi:10.1016/S1388-2457(01)80021-3).
Abstract
In 15 normal subjects, individual "profiles" of the driving reaction to intermittent photic stimulation were calculated in 15 leads, by combining EEG amplitude spectra at 11 fixed frequencies (3-24 Hz), and their higher harmonics. This was compared to the resting EEG spectrum by Pearson's correlation (R). Driving was found in 70-100% of cases in the occipital and in 30-80% in central areas, when using as criterion peak amplitudes 20%
larger than those of the neighbours, with strongest responses in the alpha band, and a secondary maximum in the theta range. In the resting EEG, no theta maxima were observed. Theta maxima in profile negatively correlated with Rs between profile and resting EEG spectra. Profiles in the second and third harmonics were highly correlated with that in fundamental, when considering the corresponding frequencies of evoked EEG activity. The frequencies of the peaks in the three profiles were close to the individual's alpha rhythm, and peak amplitudes were comparable. The profile amplitudes,
and their Rs calculated against occipital profiles, decreased towards the fi'ontal
region, where the maxima in theta and alpha bands were similar. There was high interhemisphric correlation between profiles.
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Published date: 2001
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Abstracts of the XV International Congress of Clinical Neurophysiology, Buenos Aires, 19 May 2001. Guided poster sessions: EEG in children N-0209
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Human Sciences Group
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Local EPrints ID: 10578
URI: http://eprints.soton.ac.uk/id/eprint/10578
PURE UUID: 4ef5a5e1-9548-4ec6-a6bd-116b40c1bbd5
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Date deposited: 06 Feb 2006
Last modified: 16 Mar 2024 03:29
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Author:
V.V. Lazarev
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