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Signal-Tuned Gabor Functions as Models for Stimulus-Dependent Cortical Receptive Fields

机译:信号调谐的Gabor函数作为刺激相关的皮质感受野的模型

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摘要

We propose and analyze a model, based on signal-tuned Gabor functions, for the receptive fields and responses of V1 cells. Signal-tuned Gabor functions are gaussian-modulated sinusoids whose parameters are obtained from a given, spatial, or spectral "tuning" signal. These functions can be proven to yield exact representations of their tuning signals and have recently been proposed as the kernels of a variant Gabor transform-the signal-tuned Gabor transform (STGT)-which allows the accurate detection of spatial and spectral events. Here we show that by modeling the receptive fields of simple and complex cells as signal-tuned Gabor functions and expressing their responses as STGTs, we are able to replicate the properties of these cells when tested with standard grating and slit inputs, at the same time emulating their stimulus-dependent character as revealed by recent neurophysiological studies.
机译:我们提出并分析基于信号调谐Gabor函数的模型,用于V1细胞的感受野和反应。信号调谐的Gabor函数是高斯调制的正弦曲线,其参数是从给定的空间或频谱“调谐”信号获得的。可以证明这些功能可以精确表示其调谐信号,并且最近已提出将它们用作变型Gabor变换(信号调谐Gabor变换(STGT))的内核,从而可以准确检测空间和频谱事件。在这里,我们表明,通过将简单细胞和复杂细胞的感受野建模为信号调谐的Gabor函数并将其响应表示为STGT,我们能够在使用标准光栅和狭缝输入进行测试的同时复制这些细胞的特性模仿了最近神经生理学研究所揭示的依赖于刺激的特征。

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  • 来源
    《Neural computation》 |2014年第5期|920-952|共33页
  • 作者单位

    Instituto de Computagao, Universidade Federal Fluminense, 24210-240 Niteroi RJ, Brazil;

    Instituto de Computagao, Universidade Federal Fluminense, 24210-240 Niteroi RJ, Brazil;

    Instituto de Computagao, Universidade Federal Fluminense, 24210-240 Niteroi RJ, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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