Document Detail

Modulation of event-related potentials in normal human subjects by visual divided attention to spatial and color factors.
MedLine Citation:
PMID:  11578828     Owner:  NLM     Status:  MEDLINE    
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 approximately 150 ms) showed significantly greater amplitude in Stimulus 3 than in Stimuli 1 and 2. The N2 (230 approximately 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.
S Omoto; Y Kuroiwa; M Li; H Doi; M Shimamura; S Koyano; H Segawa; Y Suzuki
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neuroscience letters     Volume:  311     ISSN:  0304-3940     ISO Abbreviation:  Neurosci. Lett.     Publication Date:  2001 Oct 
Date Detail:
Created Date:  2001-10-01     Completed Date:  2001-12-04     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  198-202     Citation Subset:  IM    
Department of Ophthalmology, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
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MeSH Terms
Attention / physiology*
Color Perception / physiology*
Evoked Potentials, Visual / physiology*
Eye Movements / physiology
Neuropsychological Tests
Photic Stimulation / methods
Psychomotor Performance / physiology
Reaction Time / physiology
Space Perception / physiology*
Temporal Lobe / physiology
Visual Cortex / physiology*

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