Krieger Mind/Brain Institute and Department of Neuroscience, The Johns Hopkins University, Baltimore, MD 21218, USA.
Proc Natl Acad Sci U S A. 2011 May 3;108(18):7583-8. doi: 10.1073/pnas.1014655108. Epub 2011 Apr 18.
Visual attention is often understood as a modulatory field acting at early stages of processing, but the mechanisms that direct and fit the field to the attended object are not known. We show that a purely spatial attention field propagating downward in the neuronal network responsible for perceptual organization will be reshaped, repositioned, and sharpened to match the object's shape and scale. Key features of the model are grouping neurons integrating local features into coherent tentative objects, excitatory feedback to the same local feature neurons that caused grouping neuron activation, and inhibition between incompatible interpretations both at the local feature level and at the object representation level.
视觉注意通常被理解为作用于加工早期的调制场，但引导和适应该场到注意对象的机制尚不清楚。我们表明，在负责知觉组织的神经元网络中向下传播的纯空间注意场将被重塑、重新定位和锐化，以匹配物体的形状和大小。该模型的关键特征是将局部特征整合到连贯的试探性对象中的分组神经元、对引起分组神经元激活的相同局部特征神经元的兴奋性反馈，以及在局部特征水平和对象表示水平上的不兼容解释之间的抑制。
