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首页> 外文会议>Computational Neuroscience Meeting(CNS03); 20030705-09; Alicante(ES) >Synchronization as a mechanism for attentional gain modulation
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Synchronization as a mechanism for attentional gain modulation

机译：同步作为注意力增益调制的机制

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摘要

Responses of neurons in monkey visual cortex are modulated when attention is directed into the receptive field of the neuron: the gain or sensitivity of the response is increased or the synchronization of the spikes to the local field potential (LFP) is increased. We investigated, using model simulations, whether the synchrony of inhibitory networks could link these observations. We found that, indeed, an increase in inhibitory synchrony could enhance the coherence of the model neurons with the simulated LFP, and could have different effects on the firing rate. When the firing rate vs. current (f-I) response curves saturated at high I, attention yielded a shift in sensitivity; alternatively, when the f—I curves were non-saturating, the most significant effect was on the gain of the response. This suggests that attention may act through changes in the synchrony of inhibitory networks.
机译：当将注意力转移到神经元的感受野中时，猴子视皮层中神经元的反应就会受到调节：反应的增益或灵敏度增加，或者峰值与局部场电位（LFP）的同步增加。我们使用模型仿真研究了抑制网络的同步性是否可以将这些观察结果联系起来。我们发现，确实，抑制性同步性的增加可以增强模型神经元与模拟LFP的相干性，并且可能对激发速率产生不同的影响。当点火速率与电流（f-I）的响应曲线在高I下达到饱和时，注意力会引起灵敏度的变化；或者，当f-I曲线不饱和时，最显着的影响是对响应增益的影响。这表明注意力可能通过抑制性网络的同步变化而起作用。

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