Skipping a Beat: Heartbeat-Evoked Potentials Reflect Predictions during Interoceptive-Exteroceptive Integration.
Skipping a Beat: Heartbeat-Evoked Potentials Reflect Predictions during Interoceptive-Exteroceptive Integration.
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DOI：
10.1093/texcom/tgaa060
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发表时间：
2020
影响因子：
--
通讯作者：
Cruse D
中科院分区：
文献类型：
--
作者：
Banellis L;Cruse D
一些理论提出，情绪和自我意识来自内部和外部信号的整合以及它们各自的精确加权期望。支持这些机制的研究表明，大脑使用来自心脏信号的时间线索来预测听觉刺激，并且这些预测及其预测误差可以在头皮心跳诱发电位（HEP）中观察到。我们通过注意和内感受能力研究了精度调节对这些跨模态预测机制的影响。我们呈现了短（感知同步）或长（感知异步）心音延迟的听觉序列，其中一半的试验包括遗漏。参与者参与了心音同步的音调（内部注意）或单独的听觉刺激（外部注意）。在省略期间比较hep可以观察到纯粹的预测信号，而不会污染听觉输入。我们观察到心音延迟的早期影响，反映了心跳驱动预期的差异。我们还观察到，当只关注内部时，忽略被认为是同步的声音比忽略被认为是异步的声音更有积极作用，这与注意力精度对增强预测的作用是一致的。这些结果为注意调节的跨模态预测编码提供了支持，并为研究其在情绪和自我意识中的作用提供了潜在的工具。
Several theories propose that emotions and self-awareness arise from the integration of internal and external signals and their respective precision-weighted expectations. Supporting these mechanisms, research indicates that the brain uses temporal cues from cardiac signals to predict auditory stimuli and that these predictions and their prediction errors can be observed in the scalp heartbeat-evoked potential (HEP). We investigated the effect of precision modulations on these cross-modal predictive mechanisms, via attention and interoceptive ability. We presented auditory sequences at short (perceived synchronous) or long (perceived asynchronous) cardio-audio delays, with half of the trials including an omission. Participants attended to the cardio-audio synchronicity of the tones (internal attention) or the auditory stimuli alone (external attention). Comparing HEPs during omissions allowed for the observation of pure predictive signals, without contaminating auditory input. We observed an early effect of cardio-audio delay, reflecting a difference in heartbeat-driven expectations. We also observed a larger positivity to the omissions of sounds perceived as synchronous than to the omissions of sounds perceived as asynchronous when attending internally only, consistent with the role of attentional precision for enhancing predictions. These results provide support for attentionally modulated cross-modal predictive coding and suggest a potential tool for investigating its role in emotion and self-awareness.