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听觉皮层中时间音高和旋律信息的处理

The processing of temporal pitch and melody information in auditory cortex.

作者信息

Patterson Roy D, Uppenkamp Stefan, Johnsrude Ingrid S, Griffiths Timothy D

机构信息

Centre for the Neural Basis of Hearing, Physiology Department, University of Cambridge, Downing Street, Cambridge, United Kingdom.

出版信息

Neuron. 2002 Nov 14;36(4):767-76. doi: 10.1016/s0896-6273(02)01060-7.

Abstract

An fMRI experiment was performed to identify the main stages of melody processing in the auditory pathway. Spectrally matched sounds that produce no pitch, fixed pitch, or melody were all found to activate Heschl's gyrus (HG) and planum temporale (PT). Within this region, sounds with pitch produced more activation than those without pitch only in the lateral half of HG. When the pitch was varied to produce a melody, there was activation in regions beyond HG and PT, specifically in the superior temporal gyrus (STG) and planum polare (PP). The results support the view that there is hierarchy of pitch processing in which the center of activity moves anterolaterally away from primary auditory cortex as the processing of melodic sounds proceeds.

摘要

进行了一项功能磁共振成像(fMRI)实验,以确定听觉通路中旋律处理的主要阶段。结果发现,频谱匹配但不产生音高、固定音高或旋律的声音均会激活赫氏回(HG)和颞平面(PT)。在该区域内,有音高的声音仅在HG外侧半部比无音高的声音产生更多激活。当音高变化以产生旋律时,HG和PT以外的区域会被激活,特别是颞上回(STG)和极平面(PP)。这些结果支持了这样一种观点,即存在音高处理层次结构,随着旋律声音的处理过程,活动中心从前向后外侧远离初级听觉皮层。

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