Downar J, Crawley A P, Mikulis D J, Davis K D
Institute of Medical Science, University of Toronto, and Toronto Western Research Institute, MP14-322, 399 Bathurst Street, Toronto, Ontario, M5T 2S8, Canada.
Nat Neurosci. 2000 Mar;3(3):277-83. doi: 10.1038/72991.
Sensory stimuli undergoing sudden changes draw attention and preferentially enter our awareness. We used event-related functional magnetic-resonance imaging (fMRI) to identify brain regions responsive to changes in visual, auditory and tactile stimuli. Unimodally responsive areas included visual, auditory and somatosensory association cortex. Multimodally responsive areas comprised a right-lateralized network including the temporoparietal junction, inferior frontal gyrus, insula and left cingulate and supplementary motor areas. These results reveal a distributed, multimodal network for involuntary attention to events in the sensory environment. This network contains areas thought to underlie the P300 event-related potential and closely corresponds to the set of cortical regions damaged in patients with hemineglect syndromes.
经历突然变化的感觉刺激会吸引注意力并优先进入我们的意识。我们使用事件相关功能磁共振成像（fMRI）来识别对视觉、听觉和触觉刺激变化有反应的脑区。单峰反应区域包括视觉、听觉和体感联合皮层。多峰反应区域包括一个右侧化网络，包括颞顶联合区、额下回、脑岛以及左侧扣带回和辅助运动区。这些结果揭示了一个分布式的多峰网络，用于对感觉环境中的事件进行非自愿注意。该网络包含被认为是P300事件相关电位基础的区域，并且与半侧空间忽视综合征患者受损的皮层区域密切对应。
