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Transformation of Event Representations along Middle Temporal Gyrus.
Cerebral Cortex ( IF 2.9 ) Pub Date : 2020-05-14 , DOI: 10.1093/cercor/bhz300
Anna Leshinskaya 1 , Sharon L Thompson-Schill 1
Affiliation  

When learning about events through visual experience, one must not only identify which events are visually similar but also retrieve those events' associates-which may be visually dissimilar-and recognize when different events have similar predictive relations. How are these demands balanced? To address this question, we taught participants the predictive structures among four events, which appeared in four different sequences, each cued by a distinct object. In each, one event ("cause") was predictably followed by another ("effect"). Sequences in the same relational category had similar predictive structure, while across categories, the effect and cause events were reversed. Using functional magnetic resonance imaging data, we measured "associative coding," indicated by correlated responses between effect and cause events; "perceptual coding," indicated by correlated responses to visually similar events; and "relational category coding," indicated by correlated responses to sequences in the same relational category. All three models characterized responses within the right middle temporal gyrus (MTG), but in different ways: Perceptual and associative coding diverged along the posterior to anterior axis, while relational categories emerged anteriorly in tandem with associative coding. Thus, along the posterior-anterior axis of MTG, the representation of the visual attributes of events is transformed to a representation of both specific and generalizable relational attributes.

中文翻译:

沿中颞回的事件表示的转换。

当通过视觉体验了解事件时,人们不仅必须识别哪些事件在视觉上相似,而且还必须检索这些事件的关联——它们可能在视觉上不同——并识别不同事件何时具有相似的预测关系。这些需求如何平衡?为了解决这个问题,我们向参与者教授了四个事件之间的预测结构,这些事件以四个不同的序列出现,每个序列都由一个不同的对象提示。在每一个事件中,一个事件(“原因”)之后是另一个事件(“结果”)。同一关系类别中的序列具有相似的预测结构,而跨类别的结果和原因事件则相反。使用功能性磁共振成像数据,我们测量了“关联编码”,由结果和原因事件之间的相关反应表示;“感知编码”,由对视觉相似事件的相关反应表示;和“关系类别编码”,由对同一关系类别中的序列的相关响应表示。所有三个模型都表征了右侧颞中回 (MTG) 内的反应,但方式不同:感知和联想编码沿后轴到前轴发散,而关系类别与联想编码一起出现在前部。因此,沿着 MTG 的后-前轴,事件的视觉属性的表示被转换为特定和可概括的关系属性的表示。和“关系类别编码”,由对同一关系类别中的序列的相关响应表示。所有三个模型都表征了右侧颞中回 (MTG) 内的反应,但方式不同:感知和联想编码沿后轴到前轴发散,而关系类别与联想编码一起出现在前部。因此,沿着 MTG 的后-前轴,事件的视觉属性的表示被转换为特定和可概括的关系属性的表示。和“关系类别编码”,由对同一关系类别中的序列的相关响应表示。所有三个模型都表征了右侧颞中回 (MTG) 内的反应,但方式不同:感知和联想编码沿后轴到前轴发散,而关系类别与联想编码一起出现在前部。因此,沿着 MTG 的后-前轴,事件的视觉属性的表示被转换为特定和可概括的关系属性的表示。感知和联想编码沿着后轴到前轴发散,而关系类别与联想编码一起出现在前面。因此,沿着 MTG 的后-前轴,事件的视觉属性的表示被转换为特定和可概括的关系属性的表示。感知和联想编码沿着后轴到前轴发散,而关系类别与联想编码一起出现在前面。因此,沿着 MTG 的后-前轴,事件的视觉属性的表示被转换为特定和可概括的关系属性的表示。
更新日期:2020-01-14
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