A distributed fMRI-based signature for the subjective experience of fear.

A distributed fMRI-based signature for the subjective experience of fear.
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DOI:
10.1038/s41467-021-26977-3
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发表时间:
2021-11-17
影响因子:
16.6
通讯作者:
Becker B
Becker B
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhou F;Zhao W;Qi Z;Geng Y;Yao S;Kendrick KM;Wager TD;Becker B

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情感神经科学对隐藏在主观恐惧感背后的特定神经系统进行了辩论。在这里,我们将功能核磁共振与机器学习相结合,通过发现(n = 67)、验证(n = 20)和概括(n = 31)队列来识别和评估预测瞬时自我报告的主观恐惧体验的敏感且可概括的神经特征。我们系统地证明,准确的恐惧预测需要分布式的大脑系统,其中重要的贡献来自皮质(例如,前额叶、中扣带和岛叶皮质)和皮质下(例如,丘脑、中脑导水管周围灰质、基底前脑和杏仁核)区域。我们进一步证明,主观恐惧的神经表征与条件性威胁和一般负面情绪的表征是不同的。总体而言,我们的发现表明,主观恐惧与其他一些厌恶状态表现出不同的神经表征,它是在分布式系统中编码的,而不是孤立的“恐惧中心”。人们对恐惧体验背后的大脑系统存在争议。在这里,作者开发了一种基于fMRI的恐惧神经信号,并表明恐惧是在分布式大脑系统中表现出来的,而不是孤立的“恐惧中心”。
The specific neural systems underlying the subjective feeling of fear are debated in affective neuroscience. Here, we combine functional MRI with machine learning to identify and evaluate a sensitive and generalizable neural signature predictive of the momentary self-reported subjective fear experience across discovery (n = 67), validation (n = 20) and generalization (n = 31) cohorts. We systematically demonstrate that accurate fear prediction crucially requires distributed brain systems, with important contributions from cortical (e.g., prefrontal, midcingulate and insular cortices) and subcortical (e.g., thalamus, periaqueductal gray, basal forebrain and amygdala) regions. We further demonstrate that the neural representation of subjective fear is distinguishable from the representation of conditioned threat and general negative affect. Overall, our findings suggest that subjective fear, which exhibits distinct neural representation with some other aversive states, is encoded in distributed systems rather than isolated ‘fear centers’. The brain systems underlying fear experience are debated. Here the authors develop an fMRI-based neural signature for fear and show that fear is represented in distributed brain systems rather than isolated ‘fear centers’.
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