Top-Down Attention Guidance Shapes Action Encoding in the pSTS
Top-Down Attention Guidance Shapes Action Encoding in the pSTS
复制标题
pSTS 中自上而下的注意力引导塑造动作编码
DOI：
10.1093/cercor/bhab029
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Grossman, Emily D
中科院分区：
文献类型：
--
作者：
Stehr, Daniel A;Zhou, Xiaojue;Tisby, Mariel;Hwu, Patrick T;Pyles, John A;Grossman, Emily D
后上级颞沟（pSTS）是一个大脑区域，其特征在于对人体动作的感知表征，促进对观察到的行为的理解。越来越多的人认识到，行动观察受到观察者期望的强烈影响（; ;）。因此，为了表征自上而下对动作观察的影响，我们评估了来自动作观察网络（AON）的多变量激活模式的统计结构，同时观察者关注动作小插曲的不同维度（动作运动学，目标或跳跃或蹲伏的化身的身份）。解码准确性不同的注意指令的功能，在右pSTS和左下额叶皮层（IFC），与右pSTS分类动作最准确的观察员出席了行动的运动学和左IFC分类最准确的观察出席了演员的目标。当观察者注意到小插图中描绘的动作时，右pSTS和右IFC之间的功能连接也增加了。我们的研究结果是证据，观众的注意状态调制的感觉表征的pSTS，与建议的pSTS占据一个间隙区调解自上而下的上下文和自下而上的感知线索在行动观察。
The posterior superior temporal sulcus (pSTS) is a brain region characterized by perceptual representations of human body actions that promote the understanding of observed behavior. Increasingly, action observation is recognized as being strongly shaped by the expectations of the observer (; ; ). Therefore, to characterize top-down influences on action observation, we evaluated the statistical structure of multivariate activation patterns from the action observation network (AON) while observers attended to the different dimensions of action vignettes (the action kinematics, goal, or identity of avatars jumping or crouching). Decoding accuracy varied as a function of attention instruction in the right pSTS and left inferior frontal cortex (IFC), with the right pSTS classifying actions most accurately when observers attended to the action kinematics and the left IFC classifying most accurately when observed attended to the actor’s goal. Functional connectivity also increased between the right pSTS and right IFC when observers attended to the actions portrayed in the vignettes. Our findings are evidence that the attentive state of the viewer modulates sensory representations in the pSTS, consistent with proposals that the pSTS occupies an interstitial zone mediating top-down context and bottom-up perceptual cues during action observation.