title: Modulation of event-related potentials in normal human subjects by visual divided attention to spatial and color factors.
abstract: 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.
authors.affiliation: Department of Ophthalmology, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Omoto
authors.forename: Y
authors.initials: Y
authors.lastname: Kuroiwa
authors.forename: M
authors.initials: M
authors.lastname: Li
authors.forename: H
authors.initials: H
authors.lastname: Doi
authors.forename: M
authors.initials: M
authors.lastname: Shimamura
authors.forename: S
authors.initials: S
authors.lastname: Koyano
authors.forename: H
authors.initials: H
authors.lastname: Segawa
authors.forename: Y
authors.initials: Y
authors.lastname: Suzuki
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D003118:Color Perception / Q000502:physiology*; D004569:Electroencephalography; D004585:Electrooculography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005133:Eye Movements / Q000502:physiology; D006801:Humans; D009483:Neuropsychological Tests; D010775:Photic Stimulation / Q000379:methods; D011597:Psychomotor Performance / Q000502:physiology; D011930:Reaction Time / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D013702:Temporal Lobe / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology*