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Individual frequency profile of photic driving in children and adolescents

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
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), p.S38. (doi:10.1016/S1388-2457(01)80021-3).

Record type: Article

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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More information

Published date: 2001
Additional Information: Abstracts of the XV International Congress of Clinical Neurophysiology, Buenos Aires, 19 May 2001. Guided poster sessions: EEG in children N-0209
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 10578
URI: http://eprints.soton.ac.uk/id/eprint/10578
PURE UUID: 4ef5a5e1-9548-4ec6-a6bd-116b40c1bbd5
ORCID for D.M. Simpson: ORCID iD orcid.org/0000-0001-9072-5088

Catalogue record

Date deposited: 06 Feb 2006
Last modified: 16 Mar 2024 03:29

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Contributors

Author: V.V. Lazarev
Author: D.M. Simpson ORCID iD

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