The role of action knowledge in the comprehension of artefacts - A PET study
The role of action knowledge in the comprehension of artefacts - A PET study
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DOI：
10.1006/nimg.2002.0969
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发表时间：
2002-01-01
期刊：
影响因子：
5.7
通讯作者：
Paulson, OB
中科院分区：
文献类型：
--
作者：
Gerlach, C;Law, I;Paulson, OB
在以前的成像研究中，左腹侧运动前皮层（PMV）的激活与视觉呈现的伪影的处理相关。有人认为，这种激活反映了行动知识的处理和行动知识有助于理解的文物。本研究的目的是测试是否激活的左PMV是共同的所有任务，涉及的理解文物或是否是任务特定的。这是通过比较与两个分类任务和两个按类别划分的命名任务（自然物体与人工制品）相关的性能和局部脑血流量（rCBF）来完成的。左PMv（BA 6/44）被激活的分类任务的文物比自然物体的分类任务和命名任务的文物。然而，左PMV与人工制品的命名任务和自然物体的命名任务之间的对比无关，也与一般的人工制品的处理无关。如果PMV介导的行动知识，这些结果表明，行动知识并不直接有助于理解的文物，但数组支持的文物分类。这些研究结果的意义进行了讨论，在特定类别的识别障碍的文物。(C)2002年，Elsevier Science。
Activation of the left ventral premotor cortex (PMv) has in previous imaging studies been associated with the processing of visually presented artefacts. It has been suggested that this activation reflects processing of action knowledge and that action knowledge contributes to the comprehension of artefacts. The purpose of the present study was to test whether activation of the left PMv is common for all tasks involving the comprehension of artefacts or whether it is task specific. This was done by comparing performance and regional cerebral blood flow (rCBF) associated with two categorization tasks and two naming tasks divided by category (natural objects vs artefacts). The left PMv (BA 6/44) was more activated by the categorization task for artefacts than by the categorization task for natural objects and the naming task for artefacts. However, the left PMv was not associated with the contrast between the naming task for artefacts and the naming task for natural objects nor with the processing of artefacts in general. If the PMv does mediate action knowledge, these results suggest that action knowledge does not contribute directly to the comprehension of artefacts but array support the categorization of artefacts. The significance of these findings is discussed in relation to category-specific recognition impairments for artefacts. (C) 2002 Elsevier Science.