Spratling M W, Johnson M H
Center for Brain and Cognitive Development, Birkbeck College, London, UK. m.spratling @bbk.ac.uk
J Cogn Neurosci. 2004 Mar;16(2):219-37. doi: 10.1162/089892904322984526.
Feedback connections are a prominent feature of cortical anatomy and are likely to have a significant functional role in neural information processing. We present a neural network model of cortical feedback that successfully simulates neurophysiological data associated with attention. In this domain, our model can be considered a more detailed, and biologically plausible, implementation of the biased competition model of attention. However, our model is more general as it can also explain a variety of other top-down processes in vision, such as figure/ground segmentation and contextual cueing. This model thus suggests that a common mechanism, involving cortical feedback pathways, is responsible for a range of phenomena and provides a unified account of currently disparate areas of research.
反馈连接是皮层解剖结构的一个显著特征，并且很可能在神经信息处理中发挥重要的功能作用。我们提出了一种皮层反馈神经网络模型，该模型成功地模拟了与注意力相关的神经生理数据。在这个领域，我们的模型可以被认为是注意力偏向竞争模型的一个更详细、更具生物学合理性的实现。然而，我们的模型更具通用性，因为它还可以解释视觉中各种其他自上而下的过程，如图形/背景分割和上下文线索提示。因此，该模型表明，一种涉及皮层反馈通路的共同机制负责一系列现象，并为当前不同的研究领域提供了统一的解释。
