LFP spectral peaks in V1 cortex: network resonance and cortico-cortical feedback.
LFP spectral peaks in V1 cortex: network resonance and cortico-cortical feedback.
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DOI：
10.1007/s10827-009-0190-2
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发表时间：
2010-12
影响因子：
1.2
通讯作者：
Shapley R
中科院分区：
文献类型：
--
作者：
Kang K;Shelley M;Henrie JA;Shapley R
本文研究了初级视皮层（V1）的皮层周期性相互作用和纹外皮层的反馈如何解释V1局部场电位（LFP）的频谱峰。最近的研究表明，视觉刺激增强了猕猴V1的LFP功率谱的γ波段（25-90 Hz）。LFP光谱中γ带峰的高度和位置与视觉刺激的大小相关。广泛的空间总和，可能介导的反馈连接从纹外皮层和远程水平连接在V1，必须发挥至关重要的作用，在LFP的大小依赖。为了分析刺激对V1皮层LFP的影响，我们提出了一个视觉皮层的网络模型，该模型包括两个群体的V1神经元，兴奋性和抑制性，还包括从纹外皮层反馈到V1。V1的神经网络模型是一个共振系统。该模型的共振频率（ResF）在γ波段，并根据皮层反馈而上下变化。该模型的ResF随着刺激的大小而向下移动，就像在真实的皮层中一样，因为增加的大小在纹外皮层和V1中招募了更多的活动，从而引起更强的反馈。该模型需要在V1内具有强的局部复发抑制，以获得与皮层数据一致的ResF。作为反复兴奋和抑制的结果的网络共振似乎是初级视皮层LFP功率谱中γ带峰值的可能解释。
This paper is about how cortical recurrent interactions in primary visual cortex (V1) together with feedback from extrastriate cortex can account for spectral peaks in the V1 local field potential (LFP). Recent studies showed that visual stimulation enhances the γ-band (25–90 Hz) of the LFP power spectrum in macaque V1. The height and location of the γ-band peak in the LFP spectrum were correlated with visual stimulus size. Extensive spatial summation, possibly mediated by feedback connections from extrastriate cortex and long-range horizontal connections in V1, must play a crucial role in the size dependence of the LFP. To analyze stimulus-effects on the LFP of V1 cortex, we propose a network model for the visual cortex that includes two populations of V1 neurons, excitatory and inhibitory, and also includes feedback to V1 from extrastriate cortex. The neural network model for V1 was a resonant system. The model’s resonance frequency (ResF) was in the γ-band and varied up or down in frequency depending on cortical feedback. The model’s ResF shifted downward with stimulus size, as in the real cortex, because increased size recruited more activity in extrastriate cortex and V1 thereby causing stronger feedback. The model needed to have strong local recurrent inhibition within V1 to obtain ResFs that agree with cortical data. Network resonance as a consequence of recurrent excitation and inhibition appears to be a likely explanation for γ-band peaks in the LFP power spectrum of the primary visual cortex.
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影响因子：
3.7
作者：
McCormick, DA;Shu, YS;Bal, T
通讯作者：
Bal, T
DOI：
10.1073/pnas.0138051100
发表时间：
2003-03-04
影响因子：
11.1
作者：
Kang, KJ;Shelley, M;Sompolinsky, H
通讯作者：
Sompolinsky, H
影响因子：
2.5
作者：
LEUNG, LWS
通讯作者：
LEUNG, LWS
影响因子：
3.4
作者：
Gieselmann, M. A.;Thiele, A.
通讯作者：
Thiele, A.
影响因子：
2.9
作者：
Boergers, Christoph;Kopell, Nancy J.
通讯作者：
Kopell, Nancy J.