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2010•Unpublished venueRequires access

Steady state visual evoked potential informed fMRI analysis for alpha, beta and gamma bands

Müge Özker, Esin Karahan, Basri Erdogan, Zübeyir Bayraktaroğlu, Ali Bayram, Ahmet Ademoğlu, Tamer Demıralp

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Abstract

In this study, simultaneous EEG and fMRI measurements are recorded from 18 healthy subjects during steady state visual stimulation. The stimulation frequencies that belong to the alpha, beta and gamma bands, at which the highest EEG amplitudes were observed, were determined for each subjects. The fMRI responses at those specific stimulation frequencies were anlayzed. Both EEG amplitudes and the fMRI parameters, namely the extent of the active area and the mean percentage positive BOLD change r were observed to be the highest at the alpha band and the lowest at the gamma band.

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What this paper is about

In this study, simultaneous EEG and fMRI measurements are recorded from 18 healthy subjects during steady state visual stimulation. The stimulation frequencies that belong to the alpha, beta and gamma bands, at which the highest EEG amplitudes were observed, were determined for each subjects. The fMRI responses at those specific stimulation frequencies were anlayzed. Both EEG amplitudes and the fMRI parameters, namely the extent of the active area and the mean percentage positive BOLD change r were observed to be the highest at the alpha band and the lowest at the gamma band.

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Available abstract

In this study, simultaneous EEG and fMRI measurements are recorded from 18 healthy subjects during steady state visual stimulation. The stimulation frequencies that belong to the alpha, beta and gamma bands, at which the highest EEG amplitudes were observed, were determined for each subjects. The fMRI responses at those specific stimulation frequencies were anlayzed. Both EEG amplitudes and the fMRI parameters, namely the extent of the active area and the mean percentage positive BOLD change r were observed to be the highest at the alpha band and the lowest at the gamma band.

Key concepts: Alpha (finance), Electroencephalography, BETA (programming language), Stimulation, Audiology, Beta Rhythm, Photic Stimulation, Resting state fMRI

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