Covariation of spectral and nonlinear EEG measures with alpha biofeedback

Fell J., , Elfadil H., , Klaver P., , Röschke J., , Elger C.E., and Fernández G., (2002) Covariation of spectral and nonlinear EEG measures with alpha biofeedback International Journal of Neuroscience, 112 (9). pp. 1047-1057.

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Abstract

This study investigated how different spectral and nonlinear EEG measures covaried with alpha power during auditory alpha biofeedback training, performed by 13 healthy subjects. We found a significant positive correlation of alpha power with the largest Lyapunov-exponent, pointing to an increased dynamical instability of the EEG accompanying alpha enhancement. Alpha power amplification, moreover, was significantly correlated with a decrease of spectral entropy within the alpha range. This outcome reflects a sharpening of the alpha peak during biofeedback training. The fact that the sharpening effect clearly preceded the increase of alpha amplitude could be exploited in future biofeedback settings.

Item Type:	Article
Divisions :	Surrey research (other units)
Authors :	Fell J., , Elfadil H., , Klaver P., , Röschke J., , Elger C.E., and Fernández G.,
Date :	2002
DOI :	10.1080/00207450290026049
Uncontrolled Keywords :	Alpha, Biofeedback, EEG, Nonlinear measures, Spectral measures
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 10:41
Last Modified :	24 Jan 2020 19:50
URI:	http://epubs.surrey.ac.uk/id/eprint/828786

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