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首页> 外文期刊>The European Journal of Neuroscience >Communication before coherence
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Communication before coherence

机译：连贯沟通

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The hypothesis of communication through coherence proposes that coherent or synchronous oscillations in connected neural systems can promote communication. It has been applied mainly to how oscillations interact in connected networks. We tested by simulations whether information transmission about an external stimulus from one network to a second network is influenced by gamma oscillations, by whether the oscillations are coherent, and by their phase. Gamma oscillations were induced by increasing the relative conductance of AMPA to NMDA excitatory synapses. It was found that small associative connection strengths between the networks were sufficient to produce information transmission (measured by Shannon mutual information) such that the second attractor network took the correct decision based on the state of the first network. Although gamma oscillations were present in both networks, the synaptic connections sufficient for perfect information transmission about the stimulus presented to the network (100% correct, 1bit of information) were insufficiently strong to produce coherence, or phase-locking, between the two networks; this only occurred when the synaptic strengths between the networks were increased by >10×. Further, the phase of the oscillations between the networks did not influence the information transmission or its speed at these connection strengths. Moreover, information transmission was as good when the AMPA-to-NMDA ratio was reduced to its normal value, and oscillations were not present. Similar results were found when the second network was not an attractor decision-making network. Thus information transmission can occur before synapses have been made sufficiently strong to produce coherence.
机译：通过相干性进行交流的假设提出，相连神经系统中的相干或同步振荡可以促进交流。它主要应用于振荡如何在连接的网络中相互作用。我们通过仿真测试了有关外部刺激从一个网络到第二个网络的信息传输是否受到伽马振荡，振荡是否相干及其相位的影响。伽玛振荡是通过增加AMPA对NMDA兴奋性突触的相对电导来诱导的。已经发现，网络之间小的关联连接强度足以产生信息传输（通过香农互信息测量），从而第二吸引子网络根据第一网络的状态做出正确的决定。尽管两个网络中都存在伽马振荡，但足以使有关网络刺激的信息完美传递（100％正确，1位信息）的突触连接不足以在两个网络之间产生连贯性或锁相。仅当网络之间的突触强度增加> 10倍时才会发生这种情况。此外，在这些连接强度下，网络之间的振荡相位不会影响信息传输或其速度。此外，当AMPA与NMDA的比率降低至其正常值时，信息传输同样良好，并且不存在振荡。当第二个网络不是吸引者决策网络时，发现了类似的结果。因此，信息传递可以在突触变得足够强以产生连贯性之前发生。

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