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Title

Neural Sources and Underlying Mechanisms of Neural Responses to Heartbeats, and their Role in Bodily Self-consciousness: An Intracranial EEG Study

Authors
Park, Hyeong-Dong
Bernasconi, Fosco
Tallon-Baudry, Catherine
Spinelli, Laurent
Published in Cerebral Cortex. 2017, p. 1-14
Abstract Recent research has shown that heartbeat-evoked potentials (HEPs), brain activity in response to heartbeats, are a useful neural measure for investigating the functional role of brain-body interactions in cognitive processes including self-consciousness. In 2 experiments, using intracranial electroencephalography (EEG), we investigated (1) the neural sources of HEPs, (2) the underlying mechanisms for HEP generation, and (3) the functional role of HEPs in bodily self-consciousness. In Experiment-1, we found that shortly after the heartbeat onset, phase distributions across single trials were significantly concentrated in 10% of the recording sites, mainly in the insula and the operculum, but also in other regions including the amygdala and fronto-temporal cortex. Such phase concentration was not accompanied by increased spectral power, and did not correlate with spectral power changes, suggesting that a phase resetting, rather than an additive "evoked potential" mechanism, underlies HEP generation. In Experiment-2, we further aimed to anatomically refine previous scalp EEG data that linked HEPs with bodily self-consciousness. We found that HEP modulations in the insula reflected an experimentally induced altered sense of self-identification. Collectively, these results provide novel and solid electrophysiological evidence on the neural sources and underlying mechanisms of HEPs, and their functional role in self-consciousness.
Keywords Bodily self-consciousnessHeartbeat-evoked potentialsInsulaIntertrial coherenceIntracranial EEG
Identifiers
PMID: 28591822
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Research group Epilepsie et Chirurgie (149)
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PARK, Hyeong-Dong et al. Neural Sources and Underlying Mechanisms of Neural Responses to Heartbeats, and their Role in Bodily Self-consciousness: An Intracranial EEG Study. In: Cerebral Cortex, 2017, p. 1-14. https://archive-ouverte.unige.ch/unige:99729

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Deposited on : 2017-11-28

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