Specificity of action representations in the lateral occipitotemporal cortex
Specificity of action representations in the lateral occipitotemporal cortex
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DOI：
10.1162/jocn.2006.18.9.1498
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发表时间：
2006-09-01
影响因子：
3.2
通讯作者：
Chatterjee, Anjan
中科院分区：
文献类型：
--
作者：
Kable, Joseph W.;Chatterjee, Anjan
识别行为的能力对认知发展和社会认知都很重要。当受试者观看动作序列时，枕颞叶外侧皮质的区域表现出更多的活动；然而，这种活动是否区分特定动作是动作识别所必需的，目前还不清楚。我们使用功能性磁共振成像适应范式来测试表现出特定动作活动的大脑区域。受试者观看了一系列动作序列，在这些序列中执行的动作或执行动作的人可以从之前的扫描中重复。三个区域--颞上沟(PSTS)、人类运动敏感皮质(MT/MST)和纹外体区(EBA)--显示出先前看到的动作的活动减少，即使这些动作是新的样本，因为涉及的人以前没有被看到过。这些特定于动作的适应效应提供了令人信服的证据，表明pSTS、MT/MST和EBA中的表征抽象了所涉及的代理人的动作，并区分了不同的特定动作。
The ability to recognize actions is important for cognitive development and social cognition. Areas in the lateral occipito-temporal cortex show increased activity when subjects view action sequences; however, whether this activity distinguishes between specific actions as necessary for action recognition is unclear. We used a functional magnetic resonance imaging adaptation paradigm to test for brain regions that exhibit action-specific activity. Subjects watched a series of action sequences in which the action performed or the person performing the action could be repeated from a previous scan. Three regions-the superior temporal sulcus (pSTS), human motion-sensitive cortex (MT/MST), and extrastriate body area (EBA)-showed decreased activity for previously seen actions, even when the actions were novel exemplars because the persons involved had not been seen previously. These action-specific adaptation effect's provide compelling evidence that representations in the pSTS, MT/MST, and EBA abstract actions from the agents involved and distinguish between different particular actions.