音高模式加工的大脑偏侧化研究

Brain Lateralization of Pitch Pattern Processing

作为一种超音段成分,音高在言语的理解和产生过程中承担着重要作用,这些作用主要包括:区别不同声调的词汇意义,区别陈述、疑问等不同的语调,标志话语的情绪色彩等。音段、语义和句法信息的加工具有左脑优势,但音高模式加工的单侧优势及其机制还存在很多争论,本文从音高模式加工的两个主要理论———功能假设和声音信号假设出发,对相关研究加以评述。

As a suprasegmental cue, pitch is important in speech communication. It signals word identity by lexical tone, intonation and affective states. The processing of semantic segment and syntax is lateralized to the left hemisphere, but debate continues concerning the lateralization of pitch patteme. This article reviews researches on hemispheric lateralization of pitch pattern processing in the context of two competing hypotheses： the functional hypothesis stating that the lateralization is determined by their functions and the acoustic hypothesis stating that all pitch patterns are lateralized to the right hemisphere.