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首页> 外文期刊>Neuron >Spontaneous events outline the realm of possible sensory responses in neocortical populations.
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Spontaneous events outline the realm of possible sensory responses in neocortical populations.

机译：自发事件概述了新皮层人群可能的感觉反应领域。

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摘要

Neocortical assemblies produce complex activity patterns both in response to sensory stimuli and spontaneously without sensory input. To investigate the structure of these patterns, we recorded from populations of 40-100 neurons in auditory and somatosensory cortices of anesthetized and awake rats using silicon microelectrodes. Population spike time patterns were broadly conserved across multiple sensory stimuli and spontaneous events. Although individual neurons showed timing variations between stimuli, these were not sufficient to disturb a generally conserved sequential organization observed at the population level, lasting for approximately 100 ms with spiking reliability decaying progressively after event onset. Preserved constraints were also seen in population firing rate vectors, with vectors evoked by individual stimuli occupying subspaces of a larger but still constrained space outlined by the set of spontaneous events. These results suggest that population spike patterns are drawn from a limited vocabulary, responses.
机译：新皮质组装体产生复杂的活动模式，既响应于感觉刺激，又自发地没有感觉输入。为了研究这些模式的结构，我们使用硅微电极记录了麻醉和清醒大鼠的听觉和体感皮质中40-100个神经元的数量。在多个感官刺激和自发事件中，种群高峰时间模式被广泛保留。尽管单个神经元显示出刺激之间的时间变化，但这些变化不足以干扰在群体水平上观察到的通常保守的顺序组织，持续约100毫秒，事件发生后峰值可靠性逐渐降低。在人口解雇率向量中也看到了保留的约束，这些向量是由单个刺激引起的，它占据了较大但仍受自发事件概述的空间的子空间。这些结果表明，人口峰值模式是从有限的词汇表中得出的。

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