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Attenuation of alpha-rhythm cardiosynchrony during subjective estimation of a minut

Attenuation of alpha-rhythm cardiosynchrony during subjective estimation of a minut

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Recieved: 12/03/2022

Accepted: 04/07/2023

Published: 06/17/2023

Keywords: time perception; interoceptive sensitivity; cardiosynchrony; alpha-­rhythm; heart-beat evoked response (HEP); inter-­trial coherence (ITC); electroencephalography (EEG)

p.: 129–143

DOI: 10.11621/npj.2023.0210

Available online: 17.06.2023

To cite this article:

Slovenko Ekaterina D., Dina G. Mitiureva, Olga V. Sysoeva. Attenuation of alpha-rhythm cardiosynchrony during subjective estimation of a minut. // National Psychological Journal 2023. 2. p.129–143. doi: 10.11621/npj.2023.0210

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Issue 2, 2023

Slovenko Ekaterina D. Lomonosov Moscow State University

Dina G. Mitiureva The Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Sciences

Olga V. Sysoeva The Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Sciences


Background. Interoception can serve as the basis for time perception. This assumption is supported with a considerable overlap between the brain structures that are involved in processing of interoceptive information and estimation of time duration. However, the psychophysiological mechanisms of interoceptive information integration during time perception remain largely unexplored. 

Objective. Analysis of the relationships between individual interoceptive sensitivity to heartbeats, evoked brain activity associated with the heartbeat, and time perception. 

Sample. The study involved 21 volunteers. 

Methods. The experimental procedure with EEG and photoplethysmogram recording included 5 experimental conditions: counting heartbeats at the specified time intervals, a resting state, and measuring a subjective minute with closed and open eyes. The epochs of recorded brain activity were defined upon the R-wave of the cardiogram. Global field power (GFP) indicators and coherence in the frequency range of the alpha rhythm were calculated. 

Results. The duration of the subjective minute did not correlate with either the perceived number of heart beats or the objective heart rate. There was also no relation between time and heart rate estimation accuracy. GFP analysis revealed a typical slow shift in brain activity, associated with heartbeat, however, it did not show a connection with the process of measuring duration, though it reacted to closing the eyes. At the same time, a decrease in the phase synchronization of the alpha rhythm relative to the heartbeat was detected while duration reproduction in comparison with resting-state. In addition, the degree of this alpha-­rhythm cardiosynchrony is negatively correlated with the magnitude of discrepancy between the subjective and objective minute. 

Conclusion. Thus, although there was no relationship between the interoceptive sensitivity to heartbeating and time perception on behavioral level, our study is the first to show that the subjective minute estimation is associated with alpha-­rhythm desynchronisation in relation to heartbeats with this desynchronization being linked to enhanced accuracy of time estimations. Overall, the results obtained complement the existing ideas about the relationship between the time perception and interoceptive signaling.


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To cite this article:

Slovenko Ekaterina D., Dina G. Mitiureva, Olga V. Sysoeva. Attenuation of alpha-rhythm cardiosynchrony during subjective estimation of a minut. // National Psychological Journal 2023. 2. p.129–143. doi: 10.11621/npj.2023.0210

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