Modulation of event-related potentials in normal human subjects by visual divided attention to spatial and color factors

被引：7
作者：
Omoto, S
Kuroiwa, Y
Li, M
Doi, H
Shimamura, M
Koyano, S
Segawa, H
Suzuki, Y
机构：
[1] Yokohama City Univ, Sch Med, Dept Neurol, Kanazawa Ku, Yokohama, Kanagawa 2360004, Japan
[2] Yokohama City Univ, Sch Med, Dept Ophthalmol, Yokohama, Kanagawa 232, Japan
来源：
NEUROSCIENCE LETTERS | 2001年 / 311卷 / 03期
关键词：
visual event-related potentials; visual divided attention; spatial attention; color attention; S1-S2; paradigm;
D O I：
10.1016/S0304-3940(01)02172-3
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
We investigated how visual event-related potentials (ERPs) are modulated by visual divided attention using an S1-S2 paradigm. Stimulus S2 consisted of non-target stimuli (Stimulus 1, 2, 3) and a target stimulus (Stimulus 4). The spatial/color factor was compared between S1 and S2: same/same (Stimulus 1); same/different (Stimulus 2); different/same (Stimulus 3); and different/different (Stimulus 4). The P1/N1 (90 similar to 150 ms) showed significantly greater amplitude in Stimulus 3 than in Stimuli 1 and 2. The N2 (230 similar to 290ms) showed significantly greater amplitude in Stimulus 2 than in Stimuli 1 and 3. We assumed that the P1/N1 was related to spatial attention, enhanced by alterations to the spatial factor, and that the N2 was related to color attention, enhanced by alterations to the color factor. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.
引用
收藏
页码：198 / 202
页数：5
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