Evoked phase synchronization between adjacent high-density electrodes in human scalp EEG : Duration and time course related to behavior
Nikolaev, Andrey R. LU
; Gong, Pulin
and Van Leeuwen, Cees
(2005)
In Clinical Neurophysiology
116(10).
p.2403-2419
- Abstract
Objective: Data from a previous event-related potential (ERP) study in visual-perceptual grouping [Nikolaev AR, van Leeuwen C. Flexibility in spatial and non-spatial feature grouping: an event-related potentials study. Brain Res Cogn Brain Res 2004;22:13-25] were re-analyzed to identify event-related dynamics of phase-synchronization. Methods: In 20 Hz activity, uniform spreading of phase synchronization in closely spaced (∼2 cm) scalp electrodes appears and disappears spontaneously. The lengths of synchronized activity intervals and how they vary as a function of stimulus presentation were compared between task and control conditions. Results: Synchronization reached a maximum in the task condition about 180 ms post-stimulus onset,... (More)
Objective: Data from a previous event-related potential (ERP) study in visual-perceptual grouping [Nikolaev AR, van Leeuwen C. Flexibility in spatial and non-spatial feature grouping: an event-related potentials study. Brain Res Cogn Brain Res 2004;22:13-25] were re-analyzed to identify event-related dynamics of phase-synchronization. Methods: In 20 Hz activity, uniform spreading of phase synchronization in closely spaced (∼2 cm) scalp electrodes appears and disappears spontaneously. The lengths of synchronized activity intervals and how they vary as a function of stimulus presentation were compared between task and control conditions. Results: Synchronization reached a maximum in the task condition about 180 ms post-stimulus onset, coinciding with the peak N180 ERP marking the deployment of task-specific attention. Synchronized intervals were longer in the task than in the control condition. Long (above 80 ms) intervals occurred at a stable rate before and just after stimulus onset, but steeply decreased 200-400 ms afterwards. Conclusions: Perceptual tasks lead to longer synchronized intervals in early visual areas. Attention deployment resets the ongoing synchronization. Event-related activity, besides low-frequency ERP, consists of high-frequency short and long synchronized intervals corresponding to evoked bursts and ongoing oscillations, respectively. Significance: High-density scalp recorded EEG revealed synchronization dynamics in a local, early visual area of cortex that can be interpreted as modulation of spontaneous ongoing task-related processes by attention.
(Less)
- author
- Nikolaev, Andrey R.
LU
; Gong, Pulin
and Van Leeuwen, Cees
- publishing date
- 2005-10-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Beta rhythm, EEG, Event-related potentials (ERP), High-density scalp electrode array, Phase synchronization, Visual perception task
- in
- Clinical Neurophysiology
- volume
- 116
- issue
- 10
- pages
- 17 pages
- publisher
- Elsevier
- external identifiers
-
- pmid:16125457
- scopus:24644460577
- ISSN
- 1388-2457
- DOI
- 10.1016/j.clinph.2005.07.003
- language
- English
- LU publication?
- no
- id
- 62c053de-f450-42a2-a8f6-ecd4e33436cc
- date added to LUP
- 2020-03-31 19:57:44
- date last changed
- 2024-01-02 08:01:44
@article{62c053de-f450-42a2-a8f6-ecd4e33436cc,
abstract = {{<p>Objective: Data from a previous event-related potential (ERP) study in visual-perceptual grouping [Nikolaev AR, van Leeuwen C. Flexibility in spatial and non-spatial feature grouping: an event-related potentials study. Brain Res Cogn Brain Res 2004;22:13-25] were re-analyzed to identify event-related dynamics of phase-synchronization. Methods: In 20 Hz activity, uniform spreading of phase synchronization in closely spaced (∼2 cm) scalp electrodes appears and disappears spontaneously. The lengths of synchronized activity intervals and how they vary as a function of stimulus presentation were compared between task and control conditions. Results: Synchronization reached a maximum in the task condition about 180 ms post-stimulus onset, coinciding with the peak N180 ERP marking the deployment of task-specific attention. Synchronized intervals were longer in the task than in the control condition. Long (above 80 ms) intervals occurred at a stable rate before and just after stimulus onset, but steeply decreased 200-400 ms afterwards. Conclusions: Perceptual tasks lead to longer synchronized intervals in early visual areas. Attention deployment resets the ongoing synchronization. Event-related activity, besides low-frequency ERP, consists of high-frequency short and long synchronized intervals corresponding to evoked bursts and ongoing oscillations, respectively. Significance: High-density scalp recorded EEG revealed synchronization dynamics in a local, early visual area of cortex that can be interpreted as modulation of spontaneous ongoing task-related processes by attention.</p>}},
author = {{Nikolaev, Andrey R. and Gong, Pulin and Van Leeuwen, Cees}},
issn = {{1388-2457}},
keywords = {{Beta rhythm; EEG; Event-related potentials (ERP); High-density scalp electrode array; Phase synchronization; Visual perception task}},
language = {{eng}},
month = {{10}},
number = {{10}},
pages = {{2403--2419}},
publisher = {{Elsevier}},
series = {{Clinical Neurophysiology}},
title = {{Evoked phase synchronization between adjacent high-density electrodes in human scalp EEG : Duration and time course related to behavior}},
url = {{http://dx.doi.org/10.1016/j.clinph.2005.07.003}},
doi = {{10.1016/j.clinph.2005.07.003}},
volume = {{116}},
year = {{2005}},
}