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P300 and alpha event-related desynchronization (ERD)

Published online by Cambridge University Press:  18 January 2001

JULIANA YORDANOVA ,
VASIL KOLEV  and
JOHN POLICH
JULIANA YORDANOVA
Affiliation:
Institute of Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
VASIL KOLEV
Affiliation:
Institute of Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
JOHN POLICH
Affiliation:
The Scripps Research Institute, La Jolla, California, USA
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Abstract

In the present study we evaluated the relationships between the P300 event-related potential and event-related desynchronization (ERD) of electroencephalographic alpha activity by simultaneously analyzing P300 as well as 7–10- and 10–14-Hz alpha ERD responses from auditory passive and active oddball conditions. We compared the effects of task (target vs. nontarget) and electrode (Fz, Cz, Pz) on P300 and ERD, and correlated P300 amplitude/latency with ERD maximal amplitude/latency across individuals. The major findings were that P300 as well as slow and fast alpha ERD manifested similar task and electrode effects. P300 preceded ERD and predicted individual variance of both slow and fast alpha ERD. The relationships of P300 with alpha ERD were different for the slow and fast alpha frequencies. These findings indicate that P300 and ERD are related such that slow and fast alpha ERDs are specifically guided or modified by the internal event(s) indexed by P300.

Keywords

P300Event-related potentials (ERPs)Event-related desynchronization (ERD)Event-related oscillations (ERO)Cognitive alphaElectroencephalography (EEG)
Type
Research Article
Information
Psychophysiology , Volume 38 , Issue 1 , January 2001 , pp. 143 - 152
Copyright
2001 Society for Psychophysiological Research

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