NDLI: Desynchronization α frequency event-related in visual selective attention requiring tasks

Content Provider	Springer Nature Link
Author	Ermachenko, N. S. Ermachenko, A. A. Latav, A. V.
Copyright Year	2011
Abstract	Comparative analysis of the EEG amplitude depression in the α band has been performed in two paradigms varying in the degree of involvement of functionally different attention processes: visual search for the relevant stimulus (RS) among many irrelevant stimuli (iRS) and oddball. Simple visual examination of several identical stimuli was used as a control for the visual search task. The method of videooculography was used for verification of gaze direction during RS search. The EEG dynamics in the α band (desynchronization, D) was considered to be a correlate of attention processes. The visual search task performance revealed considerably higher D after RS finding compared to the control. The higher degree of D during the search seems to be due to the higher complexity of the task and complexity of visual environment. The D in the frontal regions, which has the greatest amplitude, supposedly reflects the performance of an adequate motor performance program under the control of voluntary (top-down) attention. At the same time, the D in the occipital and parietal areas seems to reflect the processes of involuntary attention activated due to the change in visual information (the finding of the only RS among numerous iRS). In the oddball task, presentation of both RS and iRS also induced D, which proved to be more marked in response to RS and maximal in the visual areas. We suppose that D under oddball reflects the involvement of involuntary attention.
Starting Page	658
Ending Page	666
Page Count	9
File Format	PDF
ISSN	03621197
Journal	Human Physiology
Volume Number	37
Issue Number	6
e-ISSN	16083164
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-11-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	selective attention visual search oddball induced EEG desynchronization video oculography EOG Life Sciences Human Physiology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical)

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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