State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China.
Neuroimage. 2011 Apr 15;55(4):1853-64. doi: 10.1016/j.neuroimage.2011.01.039. Epub 2011 Jan 20.
Two specific areas within the posterior lateral temporal cortex (PLTC), the posterior superior temporal sulcus (pSTS) and the posterior middle temporal gyrus (pMTG), have been proposed to store different types of conceptual properties of motion: the pSTS encodes knowledge of articulated, biological motion, and the pMTG encodes knowledge about unarticulated, mechanical motion. We examined this hypothesis by comparing activation patterns evoked by verbs denoting biological motion (e.g., walk), mechanical motion (e.g., rotate), and low-motion events (e.g., ferment). Classical noun categories with different motion types (animals, tools, and buildings) were also tested and compared with previous findings of the categorical effects in PLTC. Replicating previous findings of different types of nouns, we observed stronger activation for animals than tools in the pSTS and stronger activation for tools compared to other types of nouns in the pMTG. However, such motion-type specific activation patterns only partly extended to verbs. Whereas the pSTS showed preferences for biological-motion verbs, no region within the pMTG was sensitive to verbs denoting mechanical motion. We speculate that the pMTG preference for tools is driven by properties other than mechanical motion, such as strong mappings between the visual form and motor-related representations.
两个特定的后外侧颞叶皮层（PLTC）区域，即后上颞沟（pSTS）和后中颞回（pMTG），被认为存储了运动的不同类型的概念属性：pSTS 编码有关关节、生物运动的知识，而 pMTG 编码有关非关节、机械运动的知识。我们通过比较动词表示生物运动（例如走）、机械运动（例如旋转）和低运动事件（例如发酵）所引发的激活模式来检验这一假设。也测试了具有不同运动类型的经典名词类别（动物、工具和建筑物），并与 PLTC 中分类效应的先前发现进行了比较。与不同类型名词的先前发现相吻合，我们观察到 pSTS 中动物的激活比工具强，而 pMTG 中工具的激活比其他类型的名词强。然而，这种运动类型特异性的激活模式仅部分扩展到动词。虽然 pSTS 对生物运动动词表现出偏好，但 pMTG 中没有区域对表示机械运动的动词敏感。我们推测，pMTG 对工具的偏好是由机械运动以外的其他特性驱动的，例如视觉形式与运动相关的表示之间的强映射。
