Center for Brain, Mind and KANSEI Sciences Research, Hiroshima University, Minami-Ku, Hiroshima, Japan.
Kyoto University, Sakyo-ku, Kyoto, Japan.
PLoS One. 2024 Aug 22;19(8):e0299091. doi: 10.1371/journal.pone.0299091. eCollection 2024.
Interoception plays an important role in emotion processing. However, the neurobiological substrates of the relationship between visceral responses and emotional experiences remain unclear. In the present study, we measured interoceptive sensitivity using the heartbeat discrimination task and investigated the effects of individual differences in interoceptive sensitivity on changes in pulse rate and insula activity in response to subjective emotional intensity. We found a positive correlation between heart rate and valence level when listening to music only in the high interoceptive sensitivity group. The valence level was also positively correlated with music-elicited anterior insula activity. Furthermore, a region of interest analysis of insula subregions revealed significant activity in the left dorsal dysgranular insula for individuals with high interoceptive sensitivity relative to individuals with low interoceptive sensitivity while listening to the high-valence music pieces. Our results suggest that individuals with high interoceptive sensitivity use their physiological responses to assess their emotional level when listening to music. In addition, insula activity may reflect the use of interoceptive signals to estimate emotions.
内感受在情绪处理中起着重要作用。然而，内脏反应与情绪体验之间的关系的神经生物学基础仍不清楚。在本研究中，我们使用心跳辨别任务来测量内感受敏感性，并研究个体内感受敏感性差异对主观情绪强度变化时脉搏率和脑岛活动的影响。我们发现，仅在高内感受敏感性组听音乐时，心率与效价水平呈正相关。效价水平也与音乐诱发的前脑岛活动呈正相关。此外，对脑岛亚区的感兴趣区分析显示，与低内感受敏感性个体相比，高内感受敏感性个体在听高效价音乐时，左背侧颗粒状脑岛活动显著。我们的结果表明，高内感受敏感性个体在听音乐时利用生理反应来评估自己的情绪水平。此外，脑岛活动可能反映了对内感受信号的利用来估计情绪。
