Neural correlates of preattentive and attentive processing of visual changes
Neural correlates of preattentive and attentive processing of visual changes
复制标题
DOI：
10.1097/00001756-200512190-00019
复制
发表时间：
2005-12-19
期刊：
影响因子：
1.7
通讯作者：
Murohashi, H
中科院分区：
文献类型：
--
作者：
Kimura, M;Katayama, J;Murohashi, H
为了确定视觉变化的前注意和注意加工的电生理学相关性，我们使用视觉S1-S2匹配任务比较了有注意和无注意空间位置的事件相关脑电位对颜色变化的反应。结果表明，与无变化刺激相比，变化刺激在100-160ms(变化相关的正性反应)和220-300ms(N270)左右的中枢负性反应时引发枕颞部正性反应(即变化相关阳性反应)。在有人值守和无人值守的位置都观察到了与变化相关的积极反应，而只有当注意力指向变化的位置时才能观察到N270。这些结果表明，变化相关的正性反映了视觉变化的前注意加工，而N270反映了人脑对视觉变化的注意加工。《神经报告》16：2061-2064(C)2005，Lippincott Williams&Wilkins。
To identify electrophysiological correlates of preattentive and attentive processing of visual changes, we compared event-related brain potentials in response to color changes at attended and unattended spatial locations using a visual S1-S2 matching task. The results showed that compared to no change, change stimuli elicited occipito-temporal positivity at around 100-160 ms (change-related positivity) and subsequent central negativity at around 220-300 ms (N270). Change-related positivity was observed in response to changes at both attended and unattended locations, while N270 was observed only when attention was directed to the location of the changes. These results suggest that change-related positivity reflects the preattentive processing of visual changes and N270 reflects the attentive processing of visual changes in the human brain. NeuroReport 16:2061-2064 (c) 2005 Lippincott Williams & Wilkins.