Prestimulus EEG alpha activity reflects temporal expectancy

Bibliographic Details
Title: Prestimulus EEG alpha activity reflects temporal expectancy
Authors: Jae Jin Kim, Byoung-Kyong Min, Hae-Jeong Park, Jin Young Park, Joong Il Kim, Eun Joo Kim
Contributors: Byoung-Kyong Min, Jin Young Park, Eun Joo Kim, Joong Il Kim, Jae-Jin Kim, Hae-Jeong Park, Kim, Jae Jin, Park, Jin Young, Park, Hae Jeong
Source: Neuroscience Letters. 438:270-274
Publisher Information: Elsevier BV, 2008.
Publication Year: 2008
Subject Terms: Adult, Male, 0301 basic medicine, Brain Mapping, Time Factors, Spectrum Analysis, CNV, Contingent Negative Variation, Alpha Rhythm, Top-down processing, Prestimulus alpha activity, Visual/physiology, Expectancy, 03 medical and health sciences, 0302 clinical medicine, Reaction Time/physiology, Contingent Negative Variation/physiology, Reaction Time, Evoked Potentials, Visual, Humans, Female, Evoked Potentials, Photic Stimulation
Description: Since prestimulus EEG alpha activity has recently been considered to convey prestimulus top-down processing, we investigated whether prestimulus alpha activity reflects temporal expectancy of upcoming stimulation even under the non-classical contingent negative variation (CNV) paradigm. EEG was recorded from 16 subjects performing a color and a shape discrimination task manipulated with constant and variable inter-stimulus interval (ISI) conditions. The power of oscillatory activity was investigated by convolving the EEG signals with Morlet wavelets. The constant ISI condition yielded significantly shorter reaction times than the variable ISI condition, indicating more efficient preparation for upcoming stimuli during the constant ISI. We found significantly higher prestimulus alpha activity in the constant ISI condition than in the variable ISI condition, but no significant CNV even in the constant ISI condition. Such a reflection of temporal expectancy in the prestimulus alpha activity corroborates that the prestimulus top-down mental state for preparing upcoming task-performance is considerably reflected in the prestimulus ongoing alpha activity.
Document Type: Article
File Description: 270~274
Language: English
ISSN: 0304-3940
DOI: 10.1016/j.neulet.2008.04.067
Access URL: https://pubmed.ncbi.nlm.nih.gov/18486342
http://www.sciencedirect.com/science/article/pii/S0304394008005417
https://www.sciencedirect.com/science/article/pii/S0304394008005417
http://europepmc.org/abstract/MED/18486342
https://koreauniv.pure.elsevier.com/en/publications/prestimulus-eeg-alpha-activity-reflects-temporal-expectancy
https://yonsei.pure.elsevier.com/en/publications/prestimulus-eeg-alpha-activity-reflects-temporal-expectancy
Rights: Elsevier TDM
CC BY NC ND
Accession Number: edsair.doi.dedup.....d1b40a38d60385858adb4b3962f9a8a8
Database: OpenAIRE
Description
ISSN:03043940
DOI:10.1016/j.neulet.2008.04.067