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Is voltage-dependent synaptic transmission in NMDA receptors a robust mechanism for working memory?

机译:NMDA受体中的电压依赖性突触传递是工作记忆的强大机制吗?

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The voltage-dependent synaptic transmission in NMDA receptors had been demonstrated to provide persistence of a stimulated activity pattern independent of any form of synaptic plasticity (Nature Neurosci. 1 (4) (1998) 273). This possible mechanism for working memory, however, relied on some unrealistic conditions. The model requires a dominance of NMDA-mediated over AMPA-mediated currents that is unlikely. Furthermore, as we will show in this paper the mechanism is not robust against realistic amounts of noise. We propose a modified model in which short-time memory of a few hundred milliseconds is maintained by input-driven NMDA currents even in the presence of high levels of noise and AMPA currents.
机译:已经证明了NMDA受体中的电压依赖性突触传递,以提供独立于任何形式的突触塑性(自然Neurosci。1(4)(1998)273)的刺激活性模式的持久性。然而,该工作记忆的这种可能机制依赖于一些不切实际的条件。该模型需要NMDA介导的NMDA介导的介导,这是不太可能的。此外,正如我们在本文中所展示的那样,这种机制对抗现实噪音量并不稳健。我们提出了一种修改模型,其中即使在存在高水平的噪声和AMPA电流的情况下,通过输入驱动的NMDA电流维持几百毫秒的短时记忆。

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