THEORETICAL PREDICTIONS OF SPATIOTEMPORAL RECEPTIVE-FIELDS OF FLY LMCS, AND EXPERIMENTAL VALIDATION
THEORETICAL PREDICTIONS OF SPATIOTEMPORAL RECEPTIVE-FIELDS OF FLY LMCS, AND EXPERIMENTAL VALIDATION
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DOI：
10.1007/bf00188924
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发表时间：
1992-09-01
影响因子：
2.1
通讯作者：
VANHATEREN, JH
中科院分区：
文献类型：
--
作者：
VANHATEREN, JH
1.提出了一种理论，利用自然图像的结构，以及它们如何随时间变化，产生时空过滤器，最大限度地提高信息流通过有限的动态范围的嘈杂的通道。对于低信噪比，滤波器具有低通特性，而对于高信噪比，滤波器具有带通特性，在空间和时间上都是如此.理论脉冲响应进行比较，在大单极细胞（LMCs）的苍蝇（丽蝇vicina）的大脑中的测量。两种不同的空间刺激（点源和宽场）在背景强度超过5.5个对数单位宽的范围。理论和实验对应良好，它们具有以下特性：随着背景强度（SNR）的增加，脉冲响应变得更快，更双相;宽场刺激比点源显示出更大的关瞬态;空间感受野的半宽度随着强度的增加而略有变化，侧抑制增加;对比效率随强度增加。
1. A theory is presented that utilizes the structure of natural images, and how they change in time, to produce spatiotemporal filters that maximize information flow through a noisy channel of limited dynamic range. For low signal-to-noise ratios (SNRs) the filter has low-pass, and for high SNRs band-pass characteristics, both in space and time.2. Theoretical impulse responses are compared to measurements in Large Monopolar Cells (LMCs) in the fly (Calliphora vicina) brain. Two different spatial stimuli (point source and wide field) were given at background intensities over a 5.5 log unit wide range. Theory and experiment correspond well, and they share the following properties: impulse responses get much faster and more biphasic with increasing background intensity (SNR); they show larger off-transients for wide field stimuli than for point sources; the half-width of the spatial receptive field changes only slightly with increased intensity, and lateral inhibition increases; contrast efficiency increases with intensity.