Imagining material versus geometric properties of objects: an fMRI study
Imagining material versus geometric properties of objects: an fMRI study
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DOI：
10.1016/j.cogbrainres.2004.10.020
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发表时间：
2005-05-01
期刊：
影响因子：
--
通讯作者：
Just, MA
中科院分区：
文献类型：
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作者：
Newman, SD;Klatzky, RL;Just, MA
据报道，有两个实验使用功能磁共振成像来比较材料和几何物体特征成像过程中的大脑激活情况。在第一个实验中，参与者要沿着材料维度（粗糙度、硬度和温度；例如，土豆和蘑菇哪个更硬？）或几何维度（大小和形状；例如，南瓜和黄瓜哪个更大？）对物体进行心理评估。在第二个实验中，当给出物体的名称以及材料（粗糙度和硬度）或几何（尺寸和形状）属性时，参与者对物体进行从 1 到 4 的评分。这两个实验都旨在检查支持处理物质物体属性相对于几何属性的底层神经基质。考虑到两种类型的对象属性的相对激活量，我们发现（1）对几何特征的询问不同地唤起涉及顶内沟内部和周围区域的视觉图像，（2）对材料特征的询问不同地唤起涉及下纹状体区域的语义对象表示的处理，以及（3）无论被询问的特征是否存在，外侧枕叶皮层（LOC）都会对形状处理做出反应。是材料或几何特征。 (c) 2004 Elsevier B.V 保留所有权利。
Two experiments are reported that used fMRI to compare the brain activation during the imagery of material and geometric object features. In the first experiment, participants were to mentally evaluate objects along either a material dimension (roughness, hardness and temperature; e.g., Which is harder, a potato or a mushroom?) or a geometric dimension (size and shape; e.g., Which is larger, a pumpkin or a cucumber?). In the second experiment, when given the name of an object and either a material (roughness and hardness) or geometric (size and shape) property participants rated the object on a scale from 1 to 4. Both experiments were designed to examine the underlying neural substrate that supports the processing of material object properties with respect to geometric properties. Considering the relative amount of activation across the two types of object properties, we found that (1) the interrogation of geometric features differentially evokes visual imagery which involves the region in and around the intraparietal sulcus, (2) the interrogation of material features differentially evokes the processing of semantic object representations which involves the inferior extrastriate region, and (3) the lateral occipital cortex (LOC) responds to shape processing regardless of whether the feature being queried is a material or geometric feature. (c) 2004 Elsevier B.V All rights reserved.