Corbetta Maurizio, Shulman Gordon L
Department of Neurology, Washington University School of Medicine, St Louis, Missouri 63110, USA.
Nat Rev Neurosci. 2002 Mar;3(3):201-15. doi: 10.1038/nrn755.
We review evidence for partially segregated networks of brain areas that carry out different attentional functions. One system, which includes parts of the intraparietal cortex and superior frontal cortex, is involved in preparing and applying goal-directed (top-down) selection for stimuli and responses. This system is also modulated by the detection of stimuli. The other system, which includes the temporoparietal cortex and inferior frontal cortex, and is largely lateralized to the right hemisphere, is not involved in top-down selection. Instead, this system is specialized for the detection of behaviourally relevant stimuli, particularly when they are salient or unexpected. This ventral frontoparietal network works as a 'circuit breaker' for the dorsal system, directing attention to salient events. Both attentional systems interact during normal vision, and both are disrupted in unilateral spatial neglect.
我们回顾了有关执行不同注意力功能的部分分离的脑区网络的证据。一个系统包括顶内皮层和额上叶皮层的部分区域，参与对刺激和反应进行目标导向（自上而下）的选择准备和应用。该系统也会受到刺激检测的调节。另一个系统包括颞顶叶皮层和额下叶皮层，主要位于右半球，不参与自上而下的选择。相反，该系统专门用于检测行为相关刺激，尤其是当这些刺激显著或意外时。这个腹侧额顶叶网络作为背侧系统的“断路器”，将注意力导向显著事件。在正常视觉过程中，两个注意力系统相互作用，并且在单侧空间忽视中两者均会受到干扰。
