Temporal matching between interoception and exteroception: electrophysiological responses in a heartbeat discrimination task.
Temporal matching between interoception and exteroception: electrophysiological responses in a heartbeat discrimination task.
复制标题
内感受和外感受之间的时间匹配：心跳辨别任务中的电生理反应。
DOI：
10.1027/0269-8803/a000224
复制
发表时间：
2018
影响因子：
1.3
通讯作者：
M..
中科院分区：
文献类型：
--
作者：
Fukushima;H.;Tanaka;Y.;& Myowa;M..
最近关于内感觉的研究强调了内感觉与外感觉之间多感觉整合的重要性。评估内感受性敏感度的常用方法之一是心跳辨别任务，即个体判断外部刺激（如音调）的时间是否与自己的心跳同步。尽管它在研究中广泛使用，但在这项任务中，内感受性和外感受性刺激之间的时间匹配的神经动力学基础仍不清楚。本研究使用脑电图（EEG）来检查执行心跳识别任务的健康参与者的神经反应。我们分析了脑电图对音调反应的差异，音调可能被认为是“心跳同步”（从R波延迟200毫秒）或“心跳非同步”（延迟0毫秒）。这些神经分化与任务表现的可能关联也被调查。与心跳-同步音调相比，心跳-同步音调导致早期脑电反应相对减少，后期P2事件相关电位（ERP）振幅增加。脑电/ERP测量的条件差异与行为测量无显著相关。本文从预测编码框架和心相依赖压力感受器功能两个角度讨论了观察到的神经反应的机制和电生理测量内感受性敏感性的可能性。
Recent studies on interoception emphasize the importance of multisensory integration between interoception and exteroception. One of the methods frequently applied for assessing interoceptive sensitivity is the heartbeat discrimination task, where individuals judge whether the timing of external stimuli (eg, tones) are synchronized to their own heartbeat. Despite its extensive use in research, the neural dynamics underlying the temporal matching between interoceptive and exteroceptive stimuli in this task have remained unclear. The present study used electroencephalography (EEG) to examine the neural responses of healthy participants who performed a heartbeat discrimination task. We analyzed the differences between EEG responses to tones, which were likely to be perceived as “heartbeat-synchronous”(200 ms delayed from the R wave) or “heartbeat-asynchronous”(0 ms delayed). Possible associations of these neural differentiations with task performance were also investigated. Compared with the responses to heartbeat-asynchronous tones, heartbeat-synchronous tones caused a relative decrease in early gamma-band EEG response and an increase in later P2 event-related potential (ERP) amplitude. Condition differences in the EEG/ERP measures were not significantly correlated with the behavioral measures. The mechanisms underlying the observed neural responses and the possibility of electrophysiological measurement of interoceptive sensitivity are discussed in terms of two perspectives: the predictive coding framework and the cardiac-phase-dependent baroreceptor function.