Issa Naoum P, Rosenberg Ari, Husson T Robert
Department of Neurobiology, University of Chicago, MC0928, 947 E. 58th Street, Chicago, IL 60637, USA.
J Neurophysiol. 2008 Jun;99(6):2745-54. doi: 10.1152/jn.90211.2008. Epub 2008 Apr 9.
The organization of primary visual cortex has been heavily studied for nearly 50 years, and in the last 20 years functional imaging has provided high-resolution maps of its tangential organization. Recently, however, the usefulness of maps like those of orientation and spatial frequency (SF) preference has been called into question because they do not, by themselves, predict how moving images are represented in V1. In this review, we discuss a model for cortical responses (the spatiotemporal filtering model) that specifies the types of cortical maps needed to predict distributed activity within V1. We then review the structure and interrelationships of several of these maps, including those of orientation, SF, and temporal frequency preference. Finally, we discuss tests of the model and the sufficiency of the requisite maps in predicting distributed cortical responses. Although the spatiotemporal filtering model does not account for all responses within V1, it does, with reasonable accuracy, predict population responses to a variety of complex stimuli.
近50年来，人们对初级视觉皮层的组织进行了大量研究，在过去20年里，功能成像提供了其切线组织的高分辨率图谱。然而，最近，像那些方向和空间频率（SF）偏好图谱的实用性受到了质疑，因为它们本身并不能预测运动图像在V1中是如何被表征的。在这篇综述中，我们讨论了一种用于皮层反应的模型（时空滤波模型），该模型规定了预测V1内分布式活动所需的皮层图谱类型。然后，我们回顾了其中几种图谱的结构和相互关系，包括方向、SF和时间频率偏好图谱。最后，我们讨论了该模型的测试以及所需图谱在预测分布式皮层反应方面的充分性。尽管时空滤波模型并不能解释V1内的所有反应，但它确实能以合理的准确性预测群体对各种复杂刺激的反应。
