Peirce J W, Taylor L J
Visual Neuroscience Group, School of Psychology, University of Nottingham, University Park, Nottingham NG7 2RD, UK.
Neuroscience. 2006 Aug 11;141(1):15-8. doi: 10.1016/j.neuroscience.2006.04.039. Epub 2006 Jun 6.
A great deal is known about the initial steps of visual processing. We know that humans have neural mechanisms selectively tuned to simple patterns of particular spatial frequencies and orientations. We also know that much later in the visual pathway, in inferotemporal cortex, cells respond to extremely complex visual patterns such as images of faces. Very little is known about intermediate levels of visual processing, where early visual signals are presumably combined to represent increasingly complex visual features. Here we show the existence of visual mechanisms in humans, tuned and selective to particular combinations of simple sinusoidal patterns, using a novel method of compound adaptation.
我们对视觉处理的初始步骤已经了解很多。我们知道人类具有神经机制，这些机制会选择性地调整以适应特定空间频率和方向的简单模式。我们还知道，在视觉通路的更后期，在颞下皮质中，细胞会对极其复杂的视觉模式做出反应，比如人脸图像。而对于视觉处理的中间层次，我们所知甚少，在这个层次中，早期视觉信号大概会被组合起来以呈现越来越复杂的视觉特征。在这里，我们使用一种新的复合适应方法，展示了人类视觉机制的存在，这些机制对简单正弦模式的特定组合进行了调整并具有选择性。
