Kounios John, Koenig Phyllis, Glosser Guila, DeVita Chris, Dennis Kari, Moore Peachie, Grossman Murray
Department of Psychology, Drexel University MS626, 245 North 15th Street, Philadelphia, PA 19102-1192, USA.
Brain Res Cogn Brain Res. 2003 Jul;17(2):484-94. doi: 10.1016/s0926-6410(03)00164-2.
Semantic memory consolidation was studied by comparing medial temporal lobe (MTL) fMRI activation to ANIMAL, IMPLEMENT and ABSTRACT nouns in healthy seniors to that of young adults. Relative to healthy seniors, young adults were predicted to show greater MTL activation for IMPLEMENTS, but not ANIMALS, because the ANIMALS category consists of highly intercorrelated and overlapping features that should require less MTL-mediated binding than IMPLEMENTS over a shorter period of time during concept consolidation. ABSTRACT meanings are context-dependent and do not consist of fixed feature sets. Thus it was predicted that ABSTRACT words would not involve age-related feature binding mediated by the MTL. These predictions were confirmed by the results. Our observations are consistent with the hypothesis that the structure of a category influences the consolidation of knowledge in semantic memory.
通过比较健康老年人与年轻人在面对动物、工具和抽象名词时内侧颞叶（MTL）功能磁共振成像（fMRI）的激活情况，对语义记忆巩固进行了研究。相对于健康老年人，预计年轻人在面对工具时会表现出更强的MTL激活，但面对动物时则不然，因为动物类别由高度相互关联和重叠的特征组成，在概念巩固过程中，与工具相比，在更短的时间内应该需要较少的MTL介导的绑定。抽象意义依赖于上下文，并不由固定的特征集组成。因此，预计抽象词不会涉及由MTL介导的与年龄相关的特征绑定。这些预测得到了结果的证实。我们的观察结果与以下假设一致，即类别结构会影响语义记忆中知识的巩固。
