From knowing what to knowing where: Modeling object-based attention with feedback disinhibition of activation
From knowing what to knowing where: Modeling object-based attention with feedback disinhibition of activation
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DOI：
10.1162/08989290152001907
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发表时间：
2001-05-01
影响因子：
3.2
通讯作者：
de Kamps, M
中科院分区：
文献类型：
--
作者：
van der Velde, F;de Kamps, M
我们提出了一种基于视觉对象的注意的神经模型，在该模型中，对象的身份被用来选择其在对象阵列中的位置。该模型是基于猴子在视觉搜索任务中观察到的神经活动。在该模型中，通过线索在腹侧流的较高区域选择对象(目标)的身份。来自这些较高区域的反馈激活将有关目标身份的信息传递到腹侧流的(较低)视网膜区域。在这些区域中，反馈激活与对象阵列产生的前馈激活相互作用。该相互作用发生在局部微电路中，并且导致对视频流的视网膜区域中与目标在对象阵列中的位置相对应的位置的选择性激活。选择性激活包括一种形式的增益控制，由去抑制产生。这种激活被传递到背侧流，将空间注意力引导到目标的位置。通过这种方式，可以生成针对目标的动作。
We propose a neural model of visual object-based attention in which the identity of an object is used to select its location in an array of objects. The model is based on neural activity observed in visual search tasks performed by monkeys. In the model, the identity of the object (target) is selected in the higher areas of the ventral stream by means of a cue. Feedback activation from these higher areas carries information about the identity of the target to the (lower) retinotopic areas of the ventral stream. In these areas, the feedback activation interacts with feedforward activation produced by the object array. The interaction occurs in local microcircuits, and results in a selective activation on locations in the retinotopic areas of the visual stream that correspond to the location of the target in the object array. The selective activation consists of a form of gain control, produced by disinhibition. Transmitted to the dorsal stream, this activation directs spatial attention to the location of the target. In this way, an action directed at the target can be generated.