Krishnan Ananthanarayan, Gandour Jackson Thomas, Bidelman Gavin M
Department of Speech Language Hearing Sciences, Purdue University, West Lafayette, Indiana, USA.
Neuroreport. 2012 May 30;23(8):498-502. doi: 10.1097/WNR.0b013e328353764d.
Linguistic and musical pitch provide an analytic window to evaluate how neural representations of important pitch attributes of a sound undergo transformation from early sensory to later cognitive stages of processing in the human brain, and how pitch-relevant experience shapes these representations. These pitch attributes are shaped differentially depending on their functional relevance to a listener. Neural encoding of pitch-relevant information is shaped by the perceptual salience of domain-specific features at subcortical (auditory brainstem) and cortical stages of processing. The emergence of a functional ear asymmetry in the neural encoding of pitch-relevant information at a lower sensory processing level supports the view that local and feedforward and feedback mechanisms are involved in pitch-relevant processing. A theoretical framework for a neural network is proposed involving coordination between local, feedforward, and feedback components that can account for experience-induced enhancement of pitch representations at multiple levels of the auditory pathway.
语言音高和音乐音高提供了一个分析窗口，用于评估声音重要音高属性的神经表征如何在人类大脑中从早期感觉阶段转变为后期认知处理阶段，以及与音高相关的经验如何塑造这些表征。这些音高属性根据它们与听众的功能相关性而有不同的塑造方式。与音高相关信息的神经编码在皮层下（听觉脑干）和皮层处理阶段受到特定领域特征的感知显著性的影响。在较低感觉处理水平上，与音高相关信息的神经编码中出现功能性耳不对称，这支持了局部、前馈和反馈机制参与与音高相关处理的观点。提出了一个神经网络的理论框架，涉及局部、前馈和反馈组件之间的协调，该框架可以解释听觉通路多个层面上经验诱导的音高表征增强。
