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Modifications of the EEG frequency pattern in humans related to a single neurofeedback session

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Abstract

We studied changes in the frequency pattern of EEG related to a single session of biological feedback by the EEG characteristics (neurofeedback, NFB) directed toward an increase in the ratio of α/θ spectral powers (SPs) (an experimental group; 30 subjects) and to a session of the supposedly indifferent acoustic influence (listening to a musical background; 30 persons). A standard technique of EEG recording was used; the loudness of white noise overlapping the musical background served as an NFB signal. EEG was recorded from the C3 and C4 leads. Within the examined experimental group, an NFB session elicited a trend toward statistically insignificant decreases in the SPs of δ, α, and β rhythms and increases in the SPs of θ and γ EEG components. Listening to a supposedly neutral musical background by the control group, with no attempts at self-control of the SPs of EEG rhythms, was followed by rather clear unidirectional (partially significant) decreases in the SPs of θ, α, β, and γ components; the δ activity in the left hemisphere decreased, while in the right hemisphere it increased. In general, results of the single NFB session were characterized by a high interindividual variability, which can be related mostly to the specificities of psychophysiological characteristics of the personality of the tested subject.

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  1. Vernadskii Tavricheskii National University, Simferopol’, Autonomic Republic of Crimea, Ukraine

    I. N. Konareva

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  1. I. N. Konareva
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Correspondence to I. N. Konareva.

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Neirofiziologiya/Neurophysiology, Vol. 37, Nos. 5/6, pp. 443–451, September–December, 2005.

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Konareva, I.N. Modifications of the EEG frequency pattern in humans related to a single neurofeedback session. Neurophysiology 37, 388–395 (2005). https://doi.org/10.1007/s11062-006-0015-0

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  • DOI: https://doi.org/10.1007/s11062-006-0015-0

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