Ferreira Roberto A, Göbel Silke M, Hymers Mark, Ellis Andrew W
Department of Psychology, University of York, Heslington, York YO10 5DD, UK; Departamento de Lenguas, Facultad de Educación, Universidad Católica de la Santísima Concepción, Alonso de Ribera 2850, Concepción 4090541, Chile.
Department of Psychology, University of York, Heslington, York YO10 5DD, UK.
Brain Lang. 2015 Apr;143:69-80. doi: 10.1016/j.bandl.2015.02.005. Epub 2015 Mar 19.
We investigated the neural correlates of concrete nouns with either many or few semantic features. A group of 21 participants underwent two days of training and were then asked to categorize 40 newly learned words and a set of matched familiar words as living or nonliving in an MRI scanner. Our results showed that the most reliable effects of semantic richness were located in the left angular gyrus (AG) and middle temporal gyrus (MTG), where activation was higher for semantically rich than poor words. Other areas showing the same pattern included bilateral precuneus and posterior cingulate gyrus. Our findings support the view that AG and anterior MTG, as part of the multimodal network, play a significant role in representing and integrating semantic features from different input modalities. We propose that activation in bilateral precuneus and posterior cingulate gyrus reflects interplay between AG and episodic memory systems during semantic retrieval.
我们研究了具有多个或较少语义特征的具体名词的神经关联。一组21名参与者接受了为期两天的训练，然后被要求在磁共振成像（MRI）扫描仪中，将40个新学单词和一组匹配的熟悉单词分类为有生命的或无生命的。我们的结果表明，语义丰富度最可靠的效应位于左侧角回（AG）和颞中回（MTG），在这些区域，语义丰富的单词比语义贫乏的单词激活程度更高。显示相同模式的其他区域包括双侧楔前叶和后扣带回。我们的研究结果支持这样一种观点，即作为多模态网络的一部分，AG和前MTG在表征和整合来自不同输入模态的语义特征方面发挥着重要作用。我们提出，双侧楔前叶和后扣带回的激活反映了语义检索过程中AG与情景记忆系统之间的相互作用。
