Preserved tool knowledge in the context of impaired action knowledge: implications for models of semantic memory.
Preserved tool knowledge in the context of impaired action knowledge: implications for models of semantic memory.
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DOI：
10.3389/fnhum.2013.00120
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发表时间：
2013
影响因子：
2.9
通讯作者：
Mahon BZ
中科院分区：
文献类型：
--
作者：
Garcea FE;Dombovy M;Mahon BZ
许多研究发现，运动系统在处理可操作物体的语义时被激活。这些现象被认为是对运动表征的模拟是概念理解过程中必要的中间步骤的证据。动作认知障碍患者的认知神经心理学评估允许对概念加工中运动模拟的必要性进行直接测试。在这里，我们报告了一名47岁男性个体（病例AA）和六名年龄匹配的对照参与者在一系列探索动作和物体知识的测试中的表现。病例AA左半球额顶叶大病变，右臂和右腿偏瘫。病例AA表现为客体相关动作产生障碍，其动作概念知识严重受损。相比之下，他关于工具和其他可操作物体的知识在很大程度上被保留了下来。行为和客体知识之间的分离很难与具身认知假说的强形式相调和。我们认为，这些和其他类似的发现表明，有必要对感觉、运动和概念过程之间的信息交换动力学提出可处理的假设。
A number of studies have observed that the motor system is activated when processing the semantics of manipulable objects. Such phenomena have been taken as evidence that simulation over motor representations is a necessary and intermediary step in the process of conceptual understanding. Cognitive neuropsychological evaluations of patients with impairments for action knowledge permit a direct test of the necessity of motor simulation in conceptual processing. Here, we report the performance of a 47-year-old male individual (Case AA) and six age-matched control participants on a number of tests probing action and object knowledge. Case AA had a large left-hemisphere frontal-parietal lesion and hemiplegia affecting his right arm and leg. Case AA presented with impairments for object-associated action production, and his conceptual knowledge of actions was severely impaired. In contrast, his knowledge of objects such as tools and other manipulable objects was largely preserved. The dissociation between action and object knowledge is difficult to reconcile with strong forms of the embodied cognition hypothesis. We suggest that these, and other similar findings, point to the need to develop tractable hypotheses about the dynamics of information exchange among sensory, motor and conceptual processes.