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Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography
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Resting-state brain correlates of cardiovascular complexity.

G Valenza, A Duggento, L Passamonti

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    Summary

    Brain activity in specific cortical areas, including the temporal and frontal regions, is linked to complex heart rate dynamics. This research explores the brain

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    Area of Science:

    • Neuroscience
    • Cardiovascular Physiology
    • Complexity Science

    Background:

    • Complex cardiac measures offer prognostic and diagnostic value for various pathologies.
    • Brain correlates of complex heart rate and sympatho-vagal dynamics remain largely unknown.

    Purpose of the Study:

    • To investigate the brain areas associated with complex cardiovascular control.
    • To explore the relationship between heart rate complexity and brain activity in healthy individuals.

    Main Methods:

    • Utilized resting-state functional Magnetic Resonance Imaging (fMRI) data from 34 healthy subjects (Human Connectome Project).
    • Applied inhomogeneous point-process approximate and sample entropy (ipApEn and ipSampEn) to assess heartbeat complexity.
    • Correlated physiological signal acquisition with fMRI data.

    Main Results:

    • Negative correlations observed between ipApEn and activity in the Temporal Gyrus, Frontal Orbital Cortex, Temporal Fusiform and Opercular cortices, Planum Temporale, and Paracingulate cortex.
    • Negative correlations also found between ipSampEn and activity in these same cortical areas, including the Temporal Fusiform cortex.
    • No significant positive correlations were identified.

    Conclusions:

    • Cardiovascular complexity at rest is associated with specific cortical brain structures.
    • Findings suggest a link to brain areas involved in parasympathetic outflow.
    • Supports a multidimensional central network controlling nonlinear cardiac dynamics, primarily under vagal tone.