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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Recurrent excitatory postsynaptic potentials induced by synchronized fast cortical oscillations
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Recurrent excitatory postsynaptic potentials induced by synchronized fast cortical oscillations

机译：同步快速皮层振荡诱发的反复兴奋性突触后电位

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摘要

Gamma frequency (about 20-70 Hz) oscilla- tions occur during novel sensory stimulation, with tight syn- chrony over distances of at least 7 mm. Synchronization in the visual system has been proposed to reflect coactivation of dif- ferent parts of the visual field by a single spatially extended object. We have shown that intracortical mechanisms, including spike doublet firing by interneurons, can account for tight long-range synchrony. Here we show that synchronous gamma oscillations in two sites also can cause long-lasting (>1 hr) potentiation of recurrent excitatory synapses. Synchronous os- cillations lasting >400 ms in hippocampal area CA1 are asso- ciated with an increase in both excitatory postsynaptic potential (EPSP) amplitude and action potential afterhyperpolarization size.
机译：在新型的感官刺激期间会发生伽马频率（大约20-70 Hz）的振荡，并且在至少7 mm的距离上具有紧密的同步性。视觉系统中的同步已被提出来反映单个空间扩展对象对视野不同部分的共同激活。我们已经表明，皮层内机制，包括由中间神经元发出的尖峰双峰激发，可以解释紧密的远程同步性。在这里，我们表明，在两个位点的同步伽马振荡也可以导致持续性（> 1小时）增强的复发性兴奋性突触。海马区CA1中持续时间> 400 ms的同步振荡与超极化后兴奋性突触后电位（EPSP）幅度和动作电位的增加有关。

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