De Valois R L, Yund E W, Hepler N
Vision Res. 1982;22(5):531-44. doi: 10.1016/0042-6989(82)90112-2.
Quantitative data are presented on the orientation and direction specificity of the responses of cells in macaque monkey striate cortex. There is a bimodal distribution of direction-specific and nondirection-specific cells, with similar orientation tuning in each class. Cells range in orientation bandwidth at half amplitude from 6 degrees to 360 degrees (i.e. no orientation tuning), with a median near 40 degrees. Foveal-parafoveal and simple-complex subsamples show similar ranges of orientation bandwidths as well as similar medians (the bandwidths being somewhat broader than those found in cat cortex). The foveal subsample and a high-spatial-frequency subsample have more horizontal and vertical optimal orientations than oblique ones. Most cells show inhibition to some orientations, as well as excitation to others. Minimum-response orientations are generally less than 90 degrees from the optimal orientation--indicating maximum inhibition adjacent to the excitatory orientations. Three simple receptive field models are shown to differ in their abilities to account for these results.
文中给出了猕猴纹状皮层细胞反应的方向和方向特异性的定量数据。方向特异性细胞和非方向特异性细胞呈双峰分布，每类细胞的方向调谐相似。细胞的半幅值方向带宽范围从6度到360度（即无方向调谐），中位数接近40度。中央凹-旁中央凹和简单-复杂子样本显示出相似的方向带宽范围以及相似的中位数（带宽比猫皮层中的稍宽）。中央凹子样本和高空间频率子样本比倾斜方向具有更多的水平和垂直最佳方向。大多数细胞对某些方向表现出抑制，而对其他方向表现出兴奋。最小反应方向通常与最佳方向相差小于90度——表明在兴奋方向附近存在最大抑制。三种简单感受野模型在解释这些结果的能力上有所不同。
