title: [Trajectories of shifting of dipole sources of visual evoked potentials over the human brain].
abstract: Dynamic study of 3D localization of the equivalent current dipole (ECD) sources of visual evoked potentials (EP) in the human brain was performed in 18 healthy subjects using a two-dipole model. Dipole tracing was performed for relatively early EP components (N1, P1, and N2) with 1-ms step. The analysis confirmed localization of these ECDs mainly in the right occipital cortex and revealed their successive shift over this area in the anterior-medial direction and then backwards in all subjects during generation of the EP components. Typically, some successive arch-like trajectories of the shift were revealed (75.8%); their duration was relatively standard (about 25 ms) and did not depend on the stimulus shape and EP phase. Between the 1st and the 2nd trajectories (110-120 ms after the stimulus onset) a jump in ECD coordinates in the medial direction was found in 85% of cases. Possible significance of the findings for the insight into dynamic topography of the visual feature processing in the human brain is discussed.
authors.forename: E S
authors.initials: ES
authors.lastname: Mikhaĭlova
authors.forename: A V
authors.initials: AV
authors.lastname: Zhila
authors.forename: A V
authors.initials: AV
authors.lastname: Slavutskaia
authors.forename: M A
authors.initials: MA
authors.lastname: Kulikov
authors.forename: I A
authors.initials: IA
authors.lastname: Shevelev
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000033:anatomy & histology / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation