Duration of coherence intervals in electrical brain activity in perceptual organization
Nikolaev, Andrey R. LU
; Gepshtein, Sergei
; Gong, Pulin
and Van Leeuwen, Cees
(2010)
In Cerebral Cortex
20(2).
p.365-382
- Abstract
We investigated the relationship between visual experience and temporal intervals of synchronized brain activity. Using high-density scalp electroencephalography, we examined how synchronized activity depends on visual stimulus information and on individual observer sensitivity. In a perceptual grouping task, we varied the ambiguity of visual stimuli and estimated observer sensitivity to this variation. We found that durations of synchronized activity in the beta frequency band were associated with both stimulus ambiguity and sensitivity: the lower the stimulus ambiguity and the higher individual observer sensitivity the longer were the episodes of synchronized activity. Durations of synchronized activity intervals followed an extreme... (More)
We investigated the relationship between visual experience and temporal intervals of synchronized brain activity. Using high-density scalp electroencephalography, we examined how synchronized activity depends on visual stimulus information and on individual observer sensitivity. In a perceptual grouping task, we varied the ambiguity of visual stimuli and estimated observer sensitivity to this variation. We found that durations of synchronized activity in the beta frequency band were associated with both stimulus ambiguity and sensitivity: the lower the stimulus ambiguity and the higher individual observer sensitivity the longer were the episodes of synchronized activity. Durations of synchronized activity intervals followed an extreme value distribution, indicating that they were limited by the slowest mechanism among the multiple neural mechanisms engaged in the perceptual task. Because the degree of stimulus ambiguity is (inversely) related to the amount of stimulus information, the durations of synchronous episodes reflect the amount of stimulus information processed in the task. We therefore interpreted our results as evidence that the alternating episodes of desynchronized and synchronized electrical brain activity reflect, respectively, the processing of information within local regions and the transfer of information across regions.
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- author
- Nikolaev, Andrey R.
LU
; Gepshtein, Sergei
; Gong, Pulin
and Van Leeuwen, Cees
- publishing date
- 2010-02-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- EEG, Extreme value distribution, Perceptual ambiguity, Perceptual grouping, Quasi-stable synchrony pattern
- in
- Cerebral Cortex
- volume
- 20
- issue
- 2
- pages
- 18 pages
- publisher
- Oxford University Press
- external identifiers
-
- scopus:74249121915
- pmid:19596712
- ISSN
- 1047-3211
- DOI
- 10.1093/cercor/bhp107
- language
- English
- LU publication?
- no
- id
- be76b73f-eab5-42da-80c0-de4eef173358
- date added to LUP
- 2020-03-31 19:52:24
- date last changed
- 2024-01-02 08:00:39
@article{be76b73f-eab5-42da-80c0-de4eef173358,
abstract = {{<p>We investigated the relationship between visual experience and temporal intervals of synchronized brain activity. Using high-density scalp electroencephalography, we examined how synchronized activity depends on visual stimulus information and on individual observer sensitivity. In a perceptual grouping task, we varied the ambiguity of visual stimuli and estimated observer sensitivity to this variation. We found that durations of synchronized activity in the beta frequency band were associated with both stimulus ambiguity and sensitivity: the lower the stimulus ambiguity and the higher individual observer sensitivity the longer were the episodes of synchronized activity. Durations of synchronized activity intervals followed an extreme value distribution, indicating that they were limited by the slowest mechanism among the multiple neural mechanisms engaged in the perceptual task. Because the degree of stimulus ambiguity is (inversely) related to the amount of stimulus information, the durations of synchronous episodes reflect the amount of stimulus information processed in the task. We therefore interpreted our results as evidence that the alternating episodes of desynchronized and synchronized electrical brain activity reflect, respectively, the processing of information within local regions and the transfer of information across regions.</p>}},
author = {{Nikolaev, Andrey R. and Gepshtein, Sergei and Gong, Pulin and Van Leeuwen, Cees}},
issn = {{1047-3211}},
keywords = {{EEG; Extreme value distribution; Perceptual ambiguity; Perceptual grouping; Quasi-stable synchrony pattern}},
language = {{eng}},
month = {{02}},
number = {{2}},
pages = {{365--382}},
publisher = {{Oxford University Press}},
series = {{Cerebral Cortex}},
title = {{Duration of coherence intervals in electrical brain activity in perceptual organization}},
url = {{http://dx.doi.org/10.1093/cercor/bhp107}},
doi = {{10.1093/cercor/bhp107}},
volume = {{20}},
year = {{2010}},
}