A human colliculus-pulvinar-amygdala pathway encodes negative emotion.

A human colliculus-pulvinar-amygdala pathway encodes negative emotion.
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DOI:
10.1016/j.neuron.2021.06.001
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发表时间:
2021-08-04
期刊:
影响因子:
16.2
通讯作者:
Wager TD
Wager TD
中科院分区:
医学1区
文献类型:
--
作者:
Kragel PA;Čeko M;Theriault J;Chen D;Satpute AB;Wald LW;Lindquist MA;Feldman Barrett L;Wager TD

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Animals must rapidly respond to threats to survive. In rodents, threat-related signals are processed through a subcortical pathway from the superior colliculus to the amygdala, a putative ‘low road’ to affective behavior. This pathway has not been well characterized in humans. We developed a novel pathway-identification framework, which uses pattern recognition to identify connected neural populations and optimize measurement of inter-region connectivity. We first verified that the model identifies known thalamocortical pathways with high sensitivity and specificity in 7T (N = 56) and 3T (N = 48) fMRI experiments. Then, we identified a human functional superior colliculus-pulvinar-amygdala pathway. Activity in this pathway encodes the intensity of normative emotional responses to negative images and sounds, but not pleasant images or painful stimuli. These results provide a functional description of a human ‘low road’ pathway selective for negative exteroceptive events and demonstrate a promising method for characterizing human functional brain pathways. Kragel et al. implement a new functional connectivity technique that estimates inter-region connections using local multivariate patterns. They identify a superior colliculus-pulvinar-amygdala pathway at 7T and 3T that responds to aversive images and sounds, but not painful stimuli. This method provides a general framework for identifying and characterizing functional pathways.
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