Shevelev I A, Sharaev G A, Lazareva N A, Novikova R V, Tikhomirov A S
Neirofiziologiia. 1983;15(5):459-65.
Orientation tuning of 148 visual cortex neurons was investigated in immobilized unanaesthetized cats. The light slit of the optimal size flashing in the receptive field was used as a stimulus. It was found that 88 neurons (59%) had double orientation tuning: preferred and additional. Additional orientation was either orthogonal or at a sharp angle to the preferred orientation. In 64% neurons double orientation was found only after a change of the contrast between stimulus and background. This kind of tuning in many neurons appeared only at definite moments after the beginning of the stimulus. Model analysis showed that double orientation tuning might be a consequence of the specific structure of neuronal receptive fields. The functional meaning of double orientation tuning and its role in the detection of visual images signs are discussed.
在固定的未麻醉猫中研究了148个视觉皮层神经元的方向调谐。在感受野中闪烁的最佳尺寸的光缝用作刺激。发现88个神经元（59%）具有双重方向调谐：偏好方向和附加方向。附加方向与偏好方向正交或呈锐角。在64%的神经元中，仅在刺激与背景之间的对比度发生变化后才发现双重方向。许多神经元中的这种调谐仅在刺激开始后的特定时刻出现。模型分析表明，双重方向调谐可能是神经元感受野特定结构的结果。讨论了双重方向调谐的功能意义及其在视觉图像特征检测中的作用。
