Local phase synchronization of event-related activity modulated by visual attention
(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.
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- author
- Nikolaev, Andrey R. LU ; Gong, Pulin and van Leeuwen, Cees
- publishing date
- 2005-03-01
- 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}}, }