J Cogn Neurosci 2011 Nov;23 (11): 3694-702. [IF:5.357]
Neural basis of linearization in speech production.
Ye Z , Habets B , Jansma BM , Münte TF .
Capital Medical University, Beijing, China.
北京首都医科大学
Abstract
An initial stage of speech production is conceptual planning, where a speaker determines which information to convey first (the linearization problem). This fMRI study investigated the linearization process during the production of "before" and "after" sentences. In "after" sentences, a series of events is expressed in the order of event occurrence. In "before" sentences, however, the order of event mention is achieved by reversing the chronological order. We suggested that the linearization process may be supported by a neural network connecting the left middle temporal gyrus (MTG) with the medial superior frontal gyrus, left middle frontal gyrus, and left angular gyrus/inferior parietal gyrus. Within this network, regions were more activated and interregional interactions were strongly enhanced for producing "before" than "after" sentences. The left MTG was also functionally connected with the left orbital inferior frontal gyrus, contributing to the retrieval of necessary world knowledge and linguistic knowledge. Connectivity between these two regions was not different between conditions.
摘要
语言产生的一个初始阶段是个概念性的规划，该规划决定了人在说话时什么信息最先传导（线性问题）。功能磁谐振成像实验研究了”之前”和“之后”句子产生的线性进程。在“之后”的句子中，一系列的事件是依照事情的发生顺序表达的。然而在“之前”类的句子中，事件的表达顺序与时间次序是相反的。我们认为线性进程可能受一个神经网络的支配，该神经网络使左颞中回与额上回、左额中回和左角形脑回或下顶回相连接。正是由于这个网络，与“之后”的句子相比，产生“之前”的句子时更多的区域被激活，它们之间的相互作用也大大提高。左颞中回也功能性的连接左眶额下回，这里负责回收必要的世界和语言知识。这两区域的连接并不是介于不同状况。
