Human brain activity during spontaneously reversing perception of ambiguous figures
Human brain activity during spontaneously reversing perception of ambiguous figures
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DOI：
10.1098/rspb.1998.0594
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发表时间：
1998-12-22
影响因子：
4.7
通讯作者：
Frackowiak, RSJ
中科院分区：
文献类型：
--
作者：
Kleinschmidt, A;Büchel, C;Frackowiak, RSJ
看着模棱两可的数字会导致两种感知之间的竞争和自发交替。利用事件相关的功能性磁共振成像，我们定位了感知逆转过程中人类大脑活动的短暂变化。激活发生在枕侧和顶叶内高阶视觉区，失活发生在初级视觉皮层和枕侧。因此，在没有任何物理刺激变化的情况下，显著的知觉翻转会短暂地参与到广泛分离的专门皮层区域中，但也与推定维持知觉稳定性的结构中的间歇性活动中断有关。综上所述，综合知觉经验的动态反映在一组合作的神经结构内的快速空间分化活动调制中。
Looking at ambiguous figures results in rivalry with spontaneous alternation between two percepts. Using event-related functional magnetic resonance imaging, we localized transient human brain activity changes during perceptual reversals. Activation occurred in ventral occipital and intraparietal higher-order visual areas, deactivation in primary visual cortex and the pulvinar. Thus, without any physical stimulus changes, salient perceptual flips briefly engage widely separated specialized cortical areas, but are also associated with intermittent activity breakdown in structures putatively maintaining perceptual stability. Together, the dynamics of integrative perceptual experience are reflected in rapid spatially differentiated activity modulation within a cooperative set of neural structures.