Conceptual representations of action in the lateral temporal cortex
Conceptual representations of action in the lateral temporal cortex
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DOI：
10.1162/089892905775008625
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发表时间：
2005-12-01
影响因子：
3.2
通讯作者：
Chatterjee, A
中科院分区：
文献类型：
--
作者：
Kable, JW;Kan, IP;Chatterjee, A
从动作图像中检索概念信息比从物体图像中检索概念信息在人体运动区（MT/MST）和附近的颞区引起更大的激活。相比之下，从动作词中提取概念性信息时，左侧颞中回和颞上回、颞顶/颞顶前部和后部的激活程度更高。我们进行了两次功能磁共振实验来复制和扩展这些关于动作词的发现。在第一个实验中，受试者在强调视觉语义信息的条件下对动作词和客体词进行概念性判断。在这些条件下，动作词再次激活了靠近MT/MST但不完全相同的后颞区。在第二个实验中，除了动作词和动物词的判断外，我们还增加了可操作对象词的概念判断。动作判断和可操作物体判断都比动物判断在颞后中回引起更大的活动。这两个实验都支持这样的假设，即中颞回的激活与获取关于运动属性的概念信息有关，而不是基于词汇或语法因素的其他解释。此外，这些实验还为枕颞外侧皮层的具体到抽象的运动表征梯度的概念提供了额外的支持，从MT/MST向前和向后延伸到周围脑皮层。
Retrieval of conceptual information from action pictures causes greater activation than from object pictures bilaterally in human motion areas (MT/MST) and nearby temporal regions. By contrast, retrieval of conceptual information from action words causes greater activation in left middle and superior temporal gyri, anterior and dorsal to the MT/MST. We performed two fMRI experiments to replicate and extend these findings regarding action words. In the first experiment, subjects performed conceptual judgments of action and object words under conditions that stressed Visual semantic information. Under these conditions, action words again activated posterior temporal regions close to, but not identical with, the MT/MST. In the second experiment, we included conceptual judgments of manipulable object words in addition to judgments of action and animal words. Both action and manipulable object judgments caused greater activity than animal judgments in the posterior middle temporal gyrus. Both of these experiments Support the hypothesis that middle temporal gyrus activation is related to accessing conceptual information about motion attributes, rather than alternative accounts on the basis of lexical or grammatical factors. Furthermore, these experiments provide additional support for the notion of a concrete to abstract gradient of motion representations with the lateral occipito-temporal cortex, extending anterior and dorsal from the MT/MST towards the peri-sylvian cortex.