Representation of action in occipito-temporal cortex.
Representation of action in occipito-temporal cortex.
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枕颞皮质的作用表示。
DOI：
10.1162/jocn.2010.21552
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发表时间：
2011
影响因子：
3.2
通讯作者：
Wiggett AJ
中科院分区：
文献类型：
--
作者：
Wiggett AJ
社会认知神经科学的一个基本问题是，他人的身份和行为在大脑中是如何以及在哪里被表征的。在这里，我们提出了Kable和Chatterjee [Kable，J.W.，& Chatterjee，A.外侧枕颞叶皮层中动作表征的特异性，认知神经科学杂志，18，1498 -1517，2006]研究枕颞叶皮层在这些过程中的作用。我们展示了演员表演全身动作的全线索电影，并使用功能磁共振成像来测试动作和身份特异性适应效应。我们检查了一系列功能定义的区域，包括纹外体和梭状体区、梭状面区、海马旁区、枕外侧复合体、右后上级颞沟和运动选择区hMT+。这些地区进行了分析与标准的单变量措施，以及多体素模式分析。此外，我们进行了全脑测试，以获得显著的适应效果。我们发现显着的行动特定的适应在许多领域，但没有证据的身份特定的适应。我们认为，这一发现可以解释的差异，在熟悉的刺激：所示的行动是熟悉的，但演员执行的行动是陌生的。然而，与以前的研究结果相反，我们发现动作适应效应不能最终与特定的功能定义区域联系在一起。相反，我们的研究结果表明，适应以前看到的行动跨身份是一个广泛的影响，明显的外侧和腹侧枕颞叶皮层。
A fundamental question for social cognitive neuroscience is how and where in the brain the identities and actions of others are represented. Here we present a replication and extension of a study by Kable and Chatterjee [Kable, J. W., & Chatterjee, A. Specificity of action representations in the lateral occipito-temporal cortex.Journal of Cognitive Neuroscience, 18,1498–1517, 2006] examining the role of occipito-temporal cortex in these processes. We presented full-cue movies of actors performing whole-body actions and used fMRI to test for action- and identity-specific adaptation effects. We examined a series of functionally defined regions, including the extrastriate and fusiform body areas, the fusiform face area, the parahippocampal place area, the lateral occipital complex, the right posterior superior temporal sulcus, and motion-selective area hMT+. These regions were analyzed with both standard univariate measures as well as multivoxel pattern analyses. Additionally, we performed whole-brain tests for significant adaptation effects. We found significant action-specific adaptation in many areas, but no evidence for identity-specific adaptation. We argue that this finding could be explained by differences in the familiarity of the stimuli presented: The actions shown were familiar but the actors performing the actions were unfamiliar. However, in contrast to previous findings, we found that the action adaptation effect could not be conclusively tied to specific functionally defined regions. Instead, our results suggest that the adaptation to previously seen actions across identities is a widespread effect, evident across lateral and ventral occipito-temporal cortex.