Differential Tuning of Ventral and Dorsal Streams during the Generation of Common and Uncommon Tool Uses.

Differential Tuning of Ventral and Dorsal Streams during the Generation of Common and Uncommon Tool Uses.
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DOI:
10.1162/jocn_a_01161
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发表时间:
2017-11
影响因子:
3.2
通讯作者:
Thompson-Schill SL
Thompson-Schill SL
中科院分区:
医学3区
文献类型:
--
作者:
Matheson HE;Buxbaum LJ;Thompson-Schill SL

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我们对工具的使用处于不同的环境中。先前的证据表明,腹流和背流中的不同区域代表了支持常用工具使用的信息。然而,考虑到对象概念的灵活性,在生成工具的新颖或不常见用法时,这些区域可能会被调整到不同类型的信息。为了研究这一点,我们收集了参与者的fMRI数据,这些参与者报告了对视觉呈现的熟悉对象做出反应的常见或不常见的工具使用情况。我们进行了模式差异分析,其中我们将皮质模式与视觉、动作和类别信息的行为测量相关联。结果表明,在非常用使用组中,背侧工具使用网络中的诱发皮层模式更多地反映动作和视觉信息,而腹侧工具使用网络中的诱发神经模式在通常使用组中更强地反映类别信息。这些结果揭示了工具使用的皮质表征的灵活性,以及更广泛地说,皮质表征的情境性。
Our use of tools is situated in different contexts. Prior evidence suggests that diverse regions within the ventral and dorsal streams represent information supporting common tool use. However, given the flexibility of object concepts, these regions may be tuned to different types of information when generating novel or uncommon uses of tools. To investigate this, we collected fMRI data from participants who reported common or uncommon tool uses in response to visually presented familiar objects. We performed a pattern dissimilarity analysis in which we correlated cortical patterns with behavioral measures of visual, action, and category information. The results showed that evoked cortical patterns within the dorsal tool use network reflected action and visual information to a greater extent in the uncommon use group, whereas evoked neural patterns within the ventral tool use network reflected categorical information more strongly in the common use group. These results reveal the flexibility of cortical representations of tool use and the situated nature of cortical representations more generally.
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