Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Local phase synchronization of event-related activity modulated by visual attention

Nikolaev, Andrey R. LU orcid ; Gong, Pulin and van Leeuwen, Cees (2005) In International Congress Series 1278. p.369-372
Abstract

In a visual task using 12 healthy subjects, spread of evoked phase-synchronized activity was studied in local cortical areas. The areas were identified in a previous study of the same data set using event-related potentials (ERP). Chains of closely spaced (∼2 cm) scalp electrodes covering these areas were selected for phase synchronization analysis in which task and control conditions were compared. Phase synchronization spreading in the task condition at 20 Hz reached a maximum about 180 ms post-stimulus in the right occipital area. This maximum coincides with the attention-related negative peak N180 in the corresponding ERP study. Intervals of evoked phase synchronization were longer in the task than in control condition. It was... (More)

In a visual task using 12 healthy subjects, spread of evoked phase-synchronized activity was studied in local cortical areas. The areas were identified in a previous study of the same data set using event-related potentials (ERP). Chains of closely spaced (∼2 cm) scalp electrodes covering these areas were selected for phase synchronization analysis in which task and control conditions were compared. Phase synchronization spreading in the task condition at 20 Hz reached a maximum about 180 ms post-stimulus in the right occipital area. This maximum coincides with the attention-related negative peak N180 in the corresponding ERP study. Intervals of evoked phase synchronization were longer in the task than in control condition. It was concluded that attention-related modulation of evoked activity is reflected not only in enhanced amplitude of low-frequency ERP, but also in phase synchronization of high-frequency ongoing rhythms in local brain areas.

(Less)
Please use this url to cite or link to this publication:
author
; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
EEG beta rhythm, Event-related potentials (ERP), High-density scalp electrode array, Phase synchronization, Visual attention
in
International Congress Series
volume
1278
pages
4 pages
publisher
Elsevier
external identifiers
  • scopus:33646440780
ISSN
0531-5131
DOI
10.1016/j.ics.2004.11.063
language
English
LU publication?
no
id
10a746df-4002-4155-a56e-3ed1224e64d5
date added to LUP
2020-03-31 19:58:37
date last changed
2022-02-01 05:25:45
@article{10a746df-4002-4155-a56e-3ed1224e64d5,
  abstract     = {{<p>In a visual task using 12 healthy subjects, spread of evoked phase-synchronized activity was studied in local cortical areas. The areas were identified in a previous study of the same data set using event-related potentials (ERP). Chains of closely spaced (∼2 cm) scalp electrodes covering these areas were selected for phase synchronization analysis in which task and control conditions were compared. Phase synchronization spreading in the task condition at 20 Hz reached a maximum about 180 ms post-stimulus in the right occipital area. This maximum coincides with the attention-related negative peak N180 in the corresponding ERP study. Intervals of evoked phase synchronization were longer in the task than in control condition. It was concluded that attention-related modulation of evoked activity is reflected not only in enhanced amplitude of low-frequency ERP, but also in phase synchronization of high-frequency ongoing rhythms in local brain areas.</p>}},
  author       = {{Nikolaev, Andrey R. and Gong, Pulin and van Leeuwen, Cees}},
  issn         = {{0531-5131}},
  keywords     = {{EEG beta rhythm; Event-related potentials (ERP); High-density scalp electrode array; Phase synchronization; Visual attention}},
  language     = {{eng}},
  month        = {{03}},
  pages        = {{369--372}},
  publisher    = {{Elsevier}},
  series       = {{International Congress Series}},
  title        = {{Local phase synchronization of event-related activity modulated by visual attention}},
  url          = {{http://dx.doi.org/10.1016/j.ics.2004.11.063}},
  doi          = {{10.1016/j.ics.2004.11.063}},
  volume       = {{1278}},
  year         = {{2005}},
}