言语中的音高信息声学语音学加工的大脑偏侧化

Hemispheric Lateralization of Acoustic-Phonetic Processing of Pitch Information in Speech

旨在探讨言语中音高信息自下而上的声学语音学加工的神经机制和大脑偏侧化。发现,被动听和主动判断任务分别激活了颞叶和额叶,激活在颞极、颞上回和额下回眶部表现出明显的右侧优势。结果表明,对言语中音高信息自下而上的声学语音学加工主要是右脑的功能,言语与非言语信号的音高信息可能有相似的加工机制,支持Gandour等提出的理论。

The neural correlate of pitch information in speech was explored in the present study. Passive listening to the stimuli with dynamic pitch variance resulted in exclusive activation in the superior temporal area and active judgment elicited activation in the frontal area. Responses to the pitch variation were lateralized to the right hemisphere in the temporal pole （TP）, superior temporal gyms （STG） and pars orbitalis of the inferior frontal gyms. These findings support the theory proposed by Gandour et al. that the down-up acoustic/phonetic processing of pitch information in speech is right-lateralized, similar with the neural correlate of pitch in nonspeech sound.