押韵加工的认知神经机制

押韵是指一对词语中从最后一个发音的元音到词尾的语音结构均相同的现象。现有押韵加工主要分为押韵识别与押韵产生两个研究领域,两者的认知加工过程相似,包括字形编码、形音转换、语音表征与语音分段等阶段。从语音加工与字形加工两方面对押韵过程的神经基础进行探讨,发现左半球颞上回与额下回分别负责语音表征与语音分段,左半球梭状回参与着字形编码,而有效的形音转换依赖于左半球顶下小叶与额下回组成的神经网络。今后应进一步整合不同研究方法与任务下的研究结果,并对押韵产生加工进行更深入的探讨。

The Neural Mechanism of Rhyme Processing

Rhyme can be defined as a pair of words that are phonologically identical from the last accented vowel to the end of a word. Researches of rhyme processing mainly focus on two fields: rhyme identification and rhyme generation, both of which have similar cognitive processes, including orthographic coding, graphic-phonetic transformation, phonological representation and phonological segmentation. Investigations about the neural basis of rhyme processing, from two aspects: phonological processing and orthographic processing, indicated that the left inferior frontal gyrus and the left superior temporal gyrus control phonological representation and phonological segmentation respectively, and the left fusiform gyrus involves in orthographic coding, while valid graphic-phonetic transformation depends on neural network composed of left inferior parietal lobule and left inferior frontal gyrus. In future, results from different research methods and tasks should be integrated, and further discussion on rhyme generation should be employed.