Authors: Toru Maekawa, Takafumi Sasaoka, Toshio Inui, Alan SR Fermin, & Shigeto Yamawaki
（前川亮，笹岡貴史，乾敏郎，アラン・ファーミン，山脇成人）

Title: Heart rate and insula activity increase in response to music in individuals with high interoceptive sensitivity.

Journal(書誌情報）:PLoS ONE 19(8): e0299091

doi : 10.1371/journal.pone.0299091

論文URL: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0299091

Abstract: 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.

著者Contact先のemail: tsasaoka[at]hiroshima-u.ac.jp（[at]を@に変更して下さい。）

日本語によるコメント
心拍弁別課題という心拍知覚に基づく課題を用いて調べた内受容感覚の個人差と，音楽を聴取したときの生理変化や脳活動との関係を調べた研究です．fMRIで測定した脳活動や生理反応を，内受容感覚の感度が高い群と低い群で比較したところ，内受容感覚感度の高い群において，感動度が高く評価された曲を聴いていたときに心拍数が有意に上昇するとともに，内受容感覚の処理に関連している島皮質中部の有意な活動が見られました．以上の結果から，内受容感覚の感度の高い個人は音楽を聴いたときの感動度の評定に内受容感覚情報を参照していることが示唆されました．

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