Functional imaging of pitch analysis
Functional imaging of pitch analysis
复制标题
DOI：
10.1196/annals.1284.004
复制
发表时间：
2003-01-01
期刊：
影响因子：
--
通讯作者：
Griffiths, TD
中科院分区：
文献类型：
--
作者：
Griffiths, TD
这项工作解决了正常音乐感知所需的音高和音高模式分析的大脑基础。最近的功能成像实验与音高分析的分层方案是一致的。在初级听觉皮层的上行听觉通路中的机制允许表征感知音高所需的各个音符的频谱和时间特征。以不同方式操纵音高强度的收敛实验表明，在Heschl陀螺的外侧部分可能存在一个“音高中心”，邻近主要听觉区域。这表明，在这个区域中存在与音高感知相关的表征，而不是物理刺激特征的简单映射。与单个音符的音高不同，对音高模式（如旋律）的分析涉及到上级颞叶和额叶的分布式处理。额叶对音高模式分析的参与程度可能部分反映了受试者是否为了完成输出任务而分析音高模式。
This work addresses the brain basis for the analysis of pitch and pitch patterns required for normal musical perception. Recent functional imaging experiments are consistent with a hierarchical scheme for the analysis of pitch. Mechanisms in the ascending auditory pathway to the primary auditory cortex allow the representation of the spectral and temporal features of individual notes required for the perception of their pitch. Converging experiments where pitch strength is manipulated in different ways suggest that there may be a "pitch center" in the lateral part of Heschl's gyros, adjacent to the primary auditory area. The suggestion is that there is a representation in this area that correlates with the perception of pitch rather than a simple mapping of physical stimulus characteristics. The analysis of patterns of pitch such as melodies, as opposed to the pitch of individual notes, involves much more distributed processing in the superior temporal lobes and frontal lobes. Involvement of the frontal lobe in pitch pattern analysis may in part reflect whether subjects analyze the pitch patterns in order to carry out an output task.