Dynamics of EEG α activity and heart rate variability in subjects performing cognitive tests

Джебраилова, Т. Д.; Коробейникова, И. И.; Каратыгин, Н. А.; Дудник, Е. Н.

doi:10.1134/s0362119715040076

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…On the other hand, we observed that the variability (MAD) of SAI and PAI significantly increased in accordance with stress levels up to stressful condition 2 . Sympathetic activity, as measured through systolic blood pressure, heart rate, ventricular ejection fraction, and skin conductance has been associated with mental stress ( 22 ); moreover, mental stress induced by mental arithmetic increases heart rate variability power in the low frequency and a decrease in its high-frequency power ( 58 – 61 ), suggesting an increase in the sympathetic tone, and a decrease in the parasympathetic one. Stress also modulates heartbeat nonlinear dynamics ( 20 , 62 ).…”

Section: Discussionmentioning

confidence: 99%

Dynamic fluctuations in ascending heart-to-brain communication under mental stress

Candia-Rivera

Norouzi

Ramsøy

et al. 2023

American Journal of Physiology-Regulatory, Integrative and Comp

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Dynamical information exchange between central and autonomic nervous systems, as referred to functional brain-heart interplay, occurs during emotional and physical arousal. It is well documented that physical and mental stress lead to sympathetic activation. Nevertheless, the role of autonomic inputs in nervous-system-wise communication under mental stress is yet unknown. In this study, we estimated the causal and bidirectional neural modulations between EEG oscillations and peripheral sympathetic and parasympathetic activities using a recently proposed computational framework for a functional brain-heart interplay assessment, namely the sympathovagal synthetic data generation model. Mental stress was elicited in 37 healthy volunteers by increasing their cognitive demands throughout three tasks associated with increased stress levels. Stress elicitation induced an increased variability in sympathovagal markers, as well as increased variability in the directional brain-heart interplay. The observed heart-to-brain interplay was primarily from sympathetic activity targeting a wide range of EEG oscillations, whereas variability in the efferent direction seemed mainly related to EEG oscillations in the gamma band. These findings extend current knowledge on stress physiology, which mainly referred to top-down neural dynamics. Our results suggest that mental stress may not cause an increase in sympathetic activity exclusively as it initiates a dynamic fluctuation within brain-body networks including bidirectional interactions at a brain-heart level. We conclude that directional brain-heart interplay measurements may provide suitable biomarkers for a quantitative stress assessment and bodily feedback may modulate the perceived stress caused by increased cognitive demand.

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Section: Discussionmentioning

confidence: 99%

Dynamic fluctuations in ascending heart-to-brain communication under mental stress

Candia-Rivera

Norouzi

Ramsøy

et al. 2023

American Journal of Physiology-Regulatory, Integrative and Comp

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“…Tretiak et al (2017) in their study indicate that a higher manifestation of logical thinking increases the functional relationship of α-waves in the central regions of the cerebral cortex. An increase in the potentials' coherence of the EEG α-band of the posterior lower-frontal cortex regions, observed with the use of mnemotechnics, can be considered as the manifestation of the α-system participation in the formation of the frontal-parietal network of selective endogenous attention, which selectively supports the active state of internal representations during the implementation of the working memory, in our case, the words encoded with the help of associations (Dzhebrailova et al, 2015). Numerous studies (Ingvar & Philipsson, 1977;Roland et al, 1987;Roland & Friberg, 1985;Decety & Ingvar, 1990) show an activation of the anterior cortex during figurative thinking, which is consistent with our data.…”

Section: Discussionmentioning

confidence: 88%

Power spectrum and coherence of electroencephalograms of young people with the use of mnemotechnics

Usenkо¹,

Severynovska²,

Коfan³

et al. 2019

Regul. Mech. Biosyst.

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The increase of external information and the need for processing of large information arrays has been leading to the search for mechanisms of thinking in mental activity, as well as new methods of data protection and reproduction. Power spectrum and coherence of electroencephalograms (EEG) during memorizing of foreign words has been analyzed in many ways: in the usual one with the help of mnemotechnics. The research was conducted during the ovarian phase of the cycle of 11 female students aged 18–20. Registration of EEG activity was carried out according to the international system of H. Jasper,"10–20". The process of recollection of associative information led to the decrease in the power spectrum of the EEG in the alpha range in the frontal and temporal loci of the left hemisphere and the prefrontal sections of both hemispheres, in the beta range it was probable only in T6 zone of beta2 range, in the delta range it was in the prefrontal, posterior lower-frontal and posttemporal loci of both hemispheres, in the central, parietal and occipital regions of the left hemisphere, as well as in the anteriofrontal zone of the right hemisphere, in the theta-range – in the prefrontal and posterior lower-frontal regions of both hemispheres and in the posttemporal and occipital loci of the left hemisphere. Synchronization in the delta range is the reflection of the processes of figural information processing and manipulation. With the increase of attention concentration, the synchronization was observed in the theta range in the anteriofrontal and F4–P4 zones. Interhemispheric functional and symmetrical bonds in the alpha and beta ranges indicate the involvement of the corpus callosum in the process of memorizing foreign words, which facilitates their faster, more correct and easier reproduction, especially with the use of associative images. The decrease of power spectrum in the delta and theta ranges showed that less effort was required to reproduce associative information than to mention unsupported images of foreign words. The effective use of the association method is realized by reduction of the power spectrum of the waves in the alpha range in the frontal and temporal loci of the left hemisphere and the prefrontal sections of both hemispheres, which indicates the activation of mental activity in these zones in the processes of maintaining and reproducing associative information.

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“…On the autonomic side, sympathetic activity is associated with mental stress elicitation, as measured from systolic blood pressure, heart rate, ventricular ejection fraction, and skin conductance [21]. The measurements on heart rate variability show that mental stress induced from mental arithmetic tasks causes increase in low frequency fluctuations, and a decrease in high frequency [35,[45][46][47], suggesting an increase in the sympathetic tone, and a decrease in the parasympathetic one. More recently, stress showed changes in heart-rate's non-linear dynamics [48], indicating more complex dynamics, beyond an increase or decrease of autonomic nervous system activities.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, we observed that the variability (MAD) of SAI and PAI significantly increased in accordance with stress levels up to stressful condition 2. Sympathetic activity, as measured through systolic blood pressure, heart rate, ventricular ejection fraction, and skin conductance, has been associated with mental stress (17); moreover, mental stress induced by mental arithmetic increases heart rate variability power in the low frequency and a decrease in its high frequency power (44)(45)(46)(47), suggesting an increase in the sympathetic tone, and a decrease in the parasympathetic one. Stress also modulates heartbeat non-linear dynamics (15,48).…”

Section: Discussionmentioning

confidence: 99%

Dynamic fluctuations in ascending heart–to–brain communication under mental stress

Candia-Rivera

Norouzi

Ramsøy

et al. 2022

Preprint

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Previous endeavors have revealed how the dynamical information exchange between central and autonomous nervous systems, as measured from brain-heart interplay, can explain emotional arousal and physical stress. In this study, we test our recently proposed computational framework for a functional brain-heart interplay assessment; the Sympatho-Vagal Synthetic Data Generation Model. The model estimates the causal and bidirectional neural modulations between EEG oscillations and sympathetic/parasympathetic activity. Here, mental stress is elicited by increasing the cognitive demand and quantified on 37 human volunteers. The increase on mental stress induced an increased variability on heart-to-brain functional interplay, primarily from sympathetic activity on EEG oscillations in the delta and beta bands. Existing theoretical and experimental evidence has shown that stress involves top-down neural dynamics in the brain. Therefore, our results show that mental stress involves dynamic and bidirectional neural interactions at a brain-body level as well, where bodily feedback shapes the perceived stress caused by an increased cognitive demand. We conclude that brain-heart interplay estimators are suitable biomarkers for stress measurements.

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Dynamics of EEG α activity and heart rate variability in subjects performing cognitive tests

Cited by 6 publications

References 14 publications

Dynamic fluctuations in ascending heart-to-brain communication under mental stress

Dynamic fluctuations in ascending heart-to-brain communication under mental stress

Power spectrum and coherence of electroencephalograms of young people with the use of mnemotechnics

Dynamic fluctuations in ascending heart–to–brain communication under mental stress

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