Prestimulus EEG alpha activity reflects temporal expectancy

Byoung Kyong Min, Jin Young Park, Eun Joo Kim, Joong Il Kim, Jae Jin Kim, Hae Jeong Park

Research output: Contribution to journalArticle

  • 16 Citations

Abstract

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.

LanguageEnglish
Pages270-274
Number of pages5
JournalNeuroscience Letters
Volume438
Issue number3
DOIs
StatePublished - 2008 Jun 27
Externally publishedYes

Fingerprint

Contingent Negative Variation
Electroencephalography
Task Performance and Analysis
Reaction Time
Color
Power (Psychology)

Keywords

  • CNV
  • Expectancy
  • Prestimulus alpha activity
  • Top-down processing

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Min, B. K., Park, J. Y., Kim, E. J., Kim, J. I., Kim, J. J., & Park, H. J. (2008). Prestimulus EEG alpha activity reflects temporal expectancy. Neuroscience Letters, 438(3), 270-274. DOI: 10.1016/j.neulet.2008.04.067

Prestimulus EEG alpha activity reflects temporal expectancy. / Min, Byoung Kyong; Park, Jin Young; Kim, Eun Joo; Kim, Joong Il; Kim, Jae Jin; Park, Hae Jeong.

In: Neuroscience Letters, Vol. 438, No. 3, 27.06.2008, p. 270-274.

Research output: Contribution to journalArticle

Min, BK, Park, JY, Kim, EJ, Kim, JI, Kim, JJ & Park, HJ 2008, 'Prestimulus EEG alpha activity reflects temporal expectancy' Neuroscience Letters, vol. 438, no. 3, pp. 270-274. DOI: 10.1016/j.neulet.2008.04.067
Min BK, Park JY, Kim EJ, Kim JI, Kim JJ, Park HJ. Prestimulus EEG alpha activity reflects temporal expectancy. Neuroscience Letters. 2008 Jun 27;438(3):270-274. Available from, DOI: 10.1016/j.neulet.2008.04.067
Min, Byoung Kyong ; Park, Jin Young ; Kim, Eun Joo ; Kim, Joong Il ; Kim, Jae Jin ; Park, Hae Jeong. / Prestimulus EEG alpha activity reflects temporal expectancy. In: Neuroscience Letters. 2008 ; Vol. 438, No. 3. pp. 270-274
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