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首页> 外文会议>Computational Neuroscience Meeting(CNS03); 20030705-09; Alicante(ES) >Response selectivity and γ-frequency fluctuations of the membrane potential in visual cortical neurons
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Response selectivity and γ-frequency fluctuations of the membrane potential in visual cortical neurons

机译：视觉皮层神经元中膜电位的响应选择性和γ-频率波动

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摘要

With in vivo intracellular recordings we show that the rapid, γ-range fluctuations of the membrane potential occur during responses to visual stimuli in both simple and complex cells in cat visual cortex. The strength of these rapid fluctuations correlated with the stimulus optimality. Furthermore, the amplitude of the γ-fluctuations correlated with the phase of stimulus-imposed slow changes of the membrane potential. The combination of these features makes cortical neurons capable to encode the slow changes in the visual world in a kind of amplitude modulation of the high-frequency fluctuations. This assures reliable transformation of the membrane potential changes into spike responses without compromising the temporal resolution of visual information encoding in the low-frequency range.
机译：通过体内细胞内记录，我们发现在猫视觉皮层的简单和复杂细胞中，对视觉刺激的响应过程中都会发生膜电位的快速γ范围波动。这些快速波动的强度与刺激的最优性相关。此外，γ涨落的幅度与刺激施加的膜电位缓慢变化的相位有关。这些特征的组合使皮质神经元能够以一种高频波动的幅度调制方式对视觉世界中的缓慢变化进行编码。这样可确保将膜电势变化可靠地转换为尖峰响应，而不会影响低频范围内可视信息编码的时间分辨率。

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