Marois R, Chun M M, Gore J C
Vanderbilt Vision Research Center, Department of Psychology, Vanderbilt University, Nashville, Tennessee 37240, USA.
Neuron. 2000 Oct;28(1):299-308. doi: 10.1016/s0896-6273(00)00104-5.
Attending to a visual event can lead to functional blindness for other events in the visual field. This limit in our attentional capacities is exemplified by the attentional blink (AB), which refers to the transient but severe impairment in perceiving the second of two temporally neighboring targets. Using functional magnetic resonance imaging (fMRI), we observed predominantly right intraparietal and frontal cortex activations associated with the AB. We further demonstrate that an AB can be elicited by both temporal and spatial distractor interference on an attended target and that both of these interference mechanisms activate the same neural circuit. These results suggest that a (right) parietofrontal network previously implicated in attentional control and enhancement is also a locus of capacity-limited processing of visual information.
关注一个视觉事件可能会导致对视野中其他事件的功能性失明。我们注意力容量的这种限制以注意瞬脱（AB）为例，它指的是在感知两个时间上相邻目标中的第二个目标时出现的短暂但严重的损伤。使用功能磁共振成像（fMRI），我们观察到与注意瞬脱相关的主要是右侧顶内沟和额叶皮质的激活。我们进一步证明，注意瞬脱可由对被关注目标的时间和空间干扰物干扰引发，并且这两种干扰机制都会激活相同的神经回路。这些结果表明，先前涉及注意力控制和增强的（右侧）顶叶-额叶网络也是视觉信息容量受限处理的位点。
