Citron M C, Emerson R C
Brain Res. 1983 Nov 21;279(1-2):271-7. doi: 10.1016/0006-8993(83)90191-9.
We studied spatiotemporal interactions in cat cortical receptive fields by presenting a stimulus composed of 16 narrow bars whose luminances were randomly modulated. Conventional stimuli were also presented to classify receptive field properties. A white noise estimate of the cell's response to a stepwise moving bar stimulus was calculated from responses to the spatiotemporal random stimulus. The white noise estimate captured the most important feature of the receptive field demonstrated by conventional stimuli, i.e. directional selectivity. In addition, the white noise analysis; (1) made visible inhibitory response phases that are usually below threshold; (2) subdivided the response into its linear and non-linear estimates; (3) further subdivided the non-linear estimate into spatial and temporal interactions; and (4) allowed estimation of responses to stimuli that were never explicitly presented.
我们通过呈现由16个窄条组成的刺激来研究猫皮层感受野中的时空相互作用，这些窄条的亮度是随机调制的。还呈现了传统刺激以对感受野特性进行分类。根据对时空随机刺激的反应计算出细胞对逐步移动的条形刺激反应的白噪声估计值。白噪声估计值捕捉到了传统刺激所显示的感受野的最重要特征，即方向选择性。此外，白噪声分析：（1）使通常低于阈值的抑制性反应阶段可见；（2）将反应细分为线性和非线性估计值；（3）将非线性估计值进一步细分为空间和时间相互作用；（4）允许估计对从未明确呈现的刺激的反应。
