The spatial summation characteristics of three categories of V1 neurons differing in non-classical receptive field modulation properties
The spatial summation characteristics of three categories of V1 neurons differing in non-classical receptive field modulation properties
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DOI：
10.1016/j.visres.2014.01.011
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发表时间：
2014-03
期刊：
影响因子：
1.8
通讯作者：
Ke Chen;Xuemei Song;Zheng Dai;Jiao Yin;Xing-Zhen Xu;Chaoyi Li
中科院分区：
文献类型：
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作者：
Ke Chen;Xuemei Song;Zheng Dai;Jiao Yin;Xing-Zhen Xu;Chaoyi Li
兴奋和抑制的空间总和决定了猫V1神经元的最终输出。为了表征兴奋性经典感受野（CRF）和抑制性非经典感受野（nCRF）区域的空间范围，我们研究了猫V1的169个神经元在高（20-90%）和低（5-15%）刺激对比下的空间总和特性。基于环绕抑制的对比度依赖性的差异将三个类别分类。我们发现，这三个类别显着不同的CRF大小，峰值放电率，简单/复杂的细胞数量的比例。在高对比度和低对比度下确定简单细胞和复杂细胞的分类。虽然大多数V1神经元在其反应中具有稳定的调制比，但在我们的样本中有10个细胞（6.2%）在不同的刺激对比度下越过了分类边界。简单细胞和复杂细胞的CRF大小无显著差异。在每个类别中的进一步比较确定，复杂细胞的CRF显着大于简单细胞的I型神经元，简单和复杂细胞的II型和III型神经元之间没有显着差异。此外，复杂细胞比简单细胞具有更高的峰值放电率。
The spatial summation of excitation and inhibition determines the final output of neurons in the cat V1. To characterize the spatial extent of the excitatory classical receptive field (CRF) and inhibitory non-classical receptive field (nCRF) areas, we examined the spatial summation properties of 169 neurons in cat V1 at high (20–90%) and low (5–15%) stimulus contrasts. Three categories were classified based on the difference in the contrast dependency of the surround suppression. We discovered that the three categories significantly differed in CRF size, peak firing rate, and the proportion of simple/complex cell number. The classification of simple and complex cells was determined at both high and low contrasts. While the majority of V1 neurons had stable modulation ratios in their responses, 10 cells (6.2%) in our sample crossed the classification boundary under different stimulus contrasts. No significant difference was found in the size of the CRF between simple and complex cells. Further comparisons in each category determined that the CRFs for complex cells were significantly larger than those for simple cells in category type I neurons, with no significant differences between simple and complex cells in category type II and type III neurons. In addition, complex cells have higher peak firing rates than simple cells.