首页> 外文会议>Computational Neuroscience Meeting(CNS03); 20030705-09; Alicante(ES) >Spike-timing-dependent synaptic plasticity can form 'zero lag links' for cortical oscillations
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Spike-timing-dependent synaptic plasticity can form 'zero lag links' for cortical oscillations

机译:依赖于尖峰时序的突触可塑性可形成“零滞后环节”以引起皮层振荡

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We study the impact of spike-timing-dependent synaptic plasticity (STDP) on coherent gamma activity between distant cortical regions with reciprocal projections. Our simulation network consists of two areas and includes a STDP model reflecting efficacy suppression between pre/ postsynaptic spike pairs as found in recent experiments during stimulation with spike trains (Nature 416 (2002) 433). We find that STDP in conjunction with oscillatory common input strengthens synapses with delays around multiples of the oscillation period. As a result, intrinsic excitatory interactions between the areas express in gamma waves with zero lag synchrony (instead of unphysiological anti-phase synchrony without STDP). We discuss the impact of efficacy suppression on learning convergence and robustness.
机译:我们研究了尖峰时间依赖的突触可塑性(STDP)对相背投影的远皮层区域之间相干γ活动的影响。我们的模拟网络由两个区域组成,包括一个STDP模型,该模型反映了突触前/突触后突峰对之间的功效抑制,如最近在利用突波序列刺激期间进行的实验中发现的那样(Nature 416(2002)433)。我们发现,STDP与振荡公共输入结合可增强突触,并具有围绕振荡周期倍数的延迟。结果,区域之间的固有兴奋性相互作用以零滞后同步(而不是没有STDP的非生理反相同步)表达为伽马波。我们讨论了效能抑制对学习收敛性和鲁棒性的影响。

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