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- W2938568093 abstract "The peripheral autonomic nervous system (ANS) adjusts the heart rate (HR) to intrinsic and extrinsic demands. It is controlled by a group of functionally connected brain regions assembling the so-called central autonomic network (CAN). More specifically, forebrain cortical regions, limbic and brainstem structures within the CAN have been identified as important components of circuits involved in HR regulation. The present study aimed to investigate whether functional connectivity (FC) between these regions varies in subjects with different heart rates. Thus, 84 healthy subjects were separated according to their HR in slow, medium and fast. We observed a direct association between HR and FC in CAN regions, where stronger FC was related to slower HR. This relationship, however, is non-linear, follows an exponential course and is not restricted to CAN areas only. The network-based analysis (NBS) using time series from 262 independent anatomical ROIs revealed significantly increased functional connectivity in subjects with slow HR compared to subjects with fast HR mainly in regions being part of the salience network, but also of the default-mode network. We additionally simulated the effect of aliasing on the functional connectivity using several TRs and heart rates to exclude the possibility that FC differences might be due to different aliasing effects in the data. The result of the simulation indicated that aliasing cannot explain our findings. Thus, present results imply a functionally meaningful coupling between FC and HR that need to be accounted for in future studies. Moreover, given the established link between HR and emotional, cognitive and social processes, present findings may also be considered to explain individual differences in brain activation or connectivity when using corresponding paradigms in the MR scanner to investigate such processes." @default.
- W2938568093 created "2019-04-25" @default.
- W2938568093 creator A5040394601 @default.
- W2938568093 creator A5052849134 @default.
- W2938568093 creator A5055729682 @default.
- W2938568093 creator A5063458011 @default.
- W2938568093 creator A5069019223 @default.
- W2938568093 creator A5081081198 @default.
- W2938568093 date "2019-08-01" @default.
- W2938568093 modified "2023-09-25" @default.
- W2938568093 title "The relationship between heart rate and functional connectivity of brain regions involved in autonomic control" @default.
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- W2938568093 doi "https://doi.org/10.1016/j.neuroimage.2019.04.014" @default.
- W2938568093 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30981856" @default.