Brown Steven, Yuan Ye
Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada.
Neuroreport. 2018 Sep 26;29(14):1214-1216. doi: 10.1097/WNR.0000000000001099.
Despite the frequent suggestion in the literature that Broca's area is a common link between vocal and gestural models of the origins of language, this has never been established within a single motor-production study. In the present functional MRI experiment, participants were asked to describe the spatial properties of objects (e.g. a motorcycle) using speech, pantomime, and drawing. Pairwise conjunction analyses revealed that the left inferior gyrus - in combination with the left basal ganglia and ventral anterior thalamus - was jointly activated for the production of speech and pantomime but not for the conjunctions with drawing. Drawing and pantomime instead showed strong overlap in the intraparietal sulcus and superior parietal region bilaterally. These results provide the first demonstration in a production study that Broca's area is jointly activated by speech and gesture when depicting the same semantic content.
尽管文献中经常提到布罗卡区是语言起源的语音和手势模型之间的共同联系，但这从未在单一的运动产生研究中得到证实。在当前的功能磁共振成像实验中，参与者被要求用言语、手势和绘画来描述物体（如摩托车）的空间属性。成对联合分析显示，左侧下回——与左侧基底神经节和腹侧前丘脑联合——在言语和手势产生时共同激活，但与绘画联合时未激活。相反，绘画和手势在双侧顶内沟和顶上区有强烈重叠。这些结果在一项产生研究中首次证明，在描绘相同语义内容时，布罗卡区会被言语和手势共同激活。
