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首页> 外文期刊>The European Journal of Neuroscience >Superposition of horseshoe-like periodicity and linear tonotopic maps in auditory cortex of the Mongolian gerbil.
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Superposition of horseshoe-like periodicity and linear tonotopic maps in auditory cortex of the Mongolian gerbil.

机译：蒙古沙鼠听觉皮层中类似马蹄形周期性和线性tonotopic映射的叠加。

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The segregation of an individual sound from a mixture of concurrent sounds, the so-called cocktail-party phenomenon, is a fundamental and largely unexplained capability of the auditory system. Speaker recognition involves grouping of the various spectral (frequency) components of an individual's voice and segregating them from other competing voices. The important parameter for grouping may be the periodicity of sound waves because the spectral components of a given voice have one periodicity, viz. fundamental frequency, as their common denominator. To determine the relationship between the representations of spectral content and periodicity in the primary auditory cortex (AI), we used optical recording of intrinsic signals and electrophysiological mapping in Mongolian gerbils (Meriones unguiculatus). We found that periodicity maps as an almost circular gradient superimposed on the linear tonotopic gradient in the low frequency part of AI. This geometry of the periodicity map may imply competitive signal processing in support of the theory of winner-takes-all
机译：单个声音与同时出现的声音的混合（所谓的鸡尾酒会现象）的分离是听觉系统的基本功能，并且在很大程度上是无法解释的。说话人识别涉及对个人语音的各种频谱（频率）成分进行分组，并将其与其他竞争语音区分开。分组的重要参数可能是声波的周期性，因为给定声音的频谱分量具有一个周期性，即。基频，作为它们的共同指标。为了确定主要听觉皮层（AI）中频谱含量的表示形式与周期性之间的关系，我们使用了内在信号的光学记录和蒙古沙鼠（Meriones unguiculatus）的电生理作图。我们发现，周期性图映射为AI低频部分中线性线性主题梯度上叠加的几乎圆形的梯度。周期图的这种几何形状可能意味着竞争性信号处理，以支持“赢者通吃”的理论

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