Open AccessSpatial and temporal variations in eye‐fixation‐related potentials[Note 1. The present study was supported by the Ministry of ...]
Author(s) -
Yagi Akihiro,
Kazai Koji,
Takeda Yuji
Publication year - 2000
Publication title -
japanese psychological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 30
eISSN - 1468-5884
pISSN - 0021-5368
DOI - 10.1111/1468-5884.00132
Subject(s) - fixation (population genetics) , brightness , eye movement , scalp , computer vision , darkness , electroencephalography , electrooculography , computer science , waveform , artificial intelligence , communication , psychology , physics , optics , neuroscience , anatomy , biology , telecommunications , biochemistry , radar , gene
When electroencephalograms (EEGs) are averaged at eye fixation pauses (at the end of saccades), the specific brain potentials related to the visual information processing can be obtained. This eye‐fixation‐related potential (EFRP) is a type of event‐related potential. In this paper, the authors introduced two systems developed at their laboratory. The first measured the distribution of EFRPs on the scalp with DC amplifiers in order to nullify eye movement artifacts. Three‐dimensional EFRP topographies were obtained. The most prominent component (lambda response) of the waveform appeared at occipital sites. The second system was designed to examine the variation in EFRPs over time, using a sliding average method. The dynamic variation in EFRPs could be observed as an animation. The sequence of variations in amplitude was continuously displayed on a screen. This indicated the process of decrease and recovery of the lambda response generated by changes between periods of brightness and darkness.