文档介绍：The Study of Spatial Selective Attention Effects by
Event-related Potentials
Meng Wang, Ling Li*, Jinxiang Zhang
Key Laboratory for NeuroIinformation of Ministry of Education
School of Life Science and Technology, University of Electronic Science and Technology of China
Chengdu, China
******@uestc.

Abstract— The effects of visuospatial selective attention on the location of a stimulus, but little attention effect on the
information processing have been investigated by means of high- latencies or scalp distributions of ponent have been
density event-related brain potentials (ERP) while the subjects reported [4]. In the present study, we adopt high-density (128-
were instructed to covertly attend to one side of the visual field channel) ERP to advance the study of the attention effects
with fixation on the center of the screen. Previous studies have induced by spatial lateralized attention to bilateral stimuli.
demonstrated the attention-related modulation of the P1 (scalp-
positive waves from 90–130 ms) and N1 (scalp-negative waves
from 160–200 ms) component of ERP recorded from the occipital II. METHOD
scalp areas contralateral to the direction of attention. In our
study, the additional modulation of the amplitude of P2 A. Stimuli and Task
component (scalp-positive waves from 220–260 ms) indicates that The experiment consists of tw