音乐是一种非语言的人类语言,建立在逻辑上,层次结构,这为探索大脑如何处理复杂的时空听觉序列提供了极好的机会。利用脑磁图的高时间分辨率,我们调查了70名参与者在识别先前记忆的音乐序列过程中,与熵和信息内容匹配的新序列相比,他们的大脑动力学展开。对全脑活动和功能连通性的测量揭示了一个广泛的大脑网络,其基础是识别记忆的听觉序列,包括初级听觉皮层,颞上回,脑岛,额叶盖骨,扣带回,眶额叶皮质,基底神经节,丘脑,和海马体。此外,而听觉皮层主要对序列的第一个音调做出反应,高阶大脑区域的活动,如扣带回,额叶盖骨,海马体,在识别记忆和新颖的音乐序列期间,随着时间的推移,眶额叶皮层大大增加。总之,使用广泛的分析技术,从解码到功能连接,并建立在以前的作品,我们的研究为有意识地识别听觉序列的时空全脑机制提供了新的见解.
Music is a non-verbal human language, built on logical, hierarchical structures, that offers excellent opportunities to explore how the brain processes complex spatiotemporal auditory sequences. Using the high temporal resolution of
magnetoencephalography, we investigated the unfolding brain dynamics of 70 participants during the recognition of previously memorized musical sequences compared to novel sequences matched in terms of entropy and information content. Measures of both whole-brain activity and functional connectivity revealed a widespread brain network underlying the recognition of the memorized auditory sequences, which comprised primary auditory cortex, superior temporal gyrus, insula, frontal operculum, cingulate gyrus, orbitofrontal cortex, basal ganglia, thalamus, and hippocampus. Furthermore, while the auditory cortex responded mainly to the first tones of the sequences, the activity of higher-order brain areas such as the cingulate gyrus, frontal operculum, hippocampus, and orbitofrontal cortex largely increased over time during the recognition of the memorized versus novel musical sequences. In conclusion, using a wide range of analytical techniques spanning from decoding to functional connectivity and building on previous works, our study provided new insights into the spatiotemporal whole-brain mechanisms for conscious recognition of auditory sequences.