Abstract
Some authors have proposed that event-related potentials (ERPs) are generated by a neuronal response which is additive to and independent of ongoing activity, others demonstrated that they are generated by partial phase-resetting of ongoing activity. We investigated the relationship between event-related oscillatory activity in the alpha band and prestimulus levels of ongoing alpha activity on ERPs. EEG was recorded from 23 participants performing a visual discrimination task. Individuals were assigned to one of three groups according to the amount of prestimulus total alpha activity, and distinct differences of the event-related EEG dynamics between groups were observed. While all groups exhibited an event-related increase in phase-locked (evoked) alpha activity, only individuals with sustained prestimulus alpha activity showed alpha-blocking, that is, a considerable decrease of poststimulus non-phase-locked alpha activity. In contrast, individuals without observable prestimulus total alpha activity showed a concurrent increase of phase-locked and non-phase-locked alpha activity after stimulation. Data from this group seems to be in favor of an additive event-related neuronal response without alpha-blocking. However, the dissociable EEG dynamics of total and evoked alpha activities together with a complementary simulation analysis indicated a partial event-related reorganization of ongoing brain activity. We conclude that both partial phase-resetting and partial additive power contribute dynamically to the generation of ERPs. The prestimulus brain state exerts a prominent influence on event-related brain responses.
| Original language | English |
|---|---|
| Pages (from-to) | 58-68 |
| Number of pages | 11 |
| Journal | International Journal of Psychophysiology |
| Volume | 65 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2007 Jul 1 |
| Externally published | Yes |
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Keywords
- Additive power
- Alpha activity
- EEG
- ERP
- Phase-resetting
ASJC Scopus subject areas
- Behavioral Neuroscience
Cite this
The best of both worlds : Phase-reset of human EEG alpha activity and additive power contribute to ERP generation. / Min, Byoung-Kyong; Busch, Niko A.; Debener, Stefan; Kranczioch, Cornelia; Hanslmayr, Simon; Engel, Andreas K.; Herrmann, Christoph S.
In: International Journal of Psychophysiology, Vol. 65, No. 1, 01.07.2007, p. 58-68.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The best of both worlds
T2 - Phase-reset of human EEG alpha activity and additive power contribute to ERP generation
AU - Min, Byoung-Kyong
AU - Busch, Niko A.
AU - Debener, Stefan
AU - Kranczioch, Cornelia
AU - Hanslmayr, Simon
AU - Engel, Andreas K.
AU - Herrmann, Christoph S.
PY - 2007/7/1
Y1 - 2007/7/1
N2 - Some authors have proposed that event-related potentials (ERPs) are generated by a neuronal response which is additive to and independent of ongoing activity, others demonstrated that they are generated by partial phase-resetting of ongoing activity. We investigated the relationship between event-related oscillatory activity in the alpha band and prestimulus levels of ongoing alpha activity on ERPs. EEG was recorded from 23 participants performing a visual discrimination task. Individuals were assigned to one of three groups according to the amount of prestimulus total alpha activity, and distinct differences of the event-related EEG dynamics between groups were observed. While all groups exhibited an event-related increase in phase-locked (evoked) alpha activity, only individuals with sustained prestimulus alpha activity showed alpha-blocking, that is, a considerable decrease of poststimulus non-phase-locked alpha activity. In contrast, individuals without observable prestimulus total alpha activity showed a concurrent increase of phase-locked and non-phase-locked alpha activity after stimulation. Data from this group seems to be in favor of an additive event-related neuronal response without alpha-blocking. However, the dissociable EEG dynamics of total and evoked alpha activities together with a complementary simulation analysis indicated a partial event-related reorganization of ongoing brain activity. We conclude that both partial phase-resetting and partial additive power contribute dynamically to the generation of ERPs. The prestimulus brain state exerts a prominent influence on event-related brain responses.
AB - Some authors have proposed that event-related potentials (ERPs) are generated by a neuronal response which is additive to and independent of ongoing activity, others demonstrated that they are generated by partial phase-resetting of ongoing activity. We investigated the relationship between event-related oscillatory activity in the alpha band and prestimulus levels of ongoing alpha activity on ERPs. EEG was recorded from 23 participants performing a visual discrimination task. Individuals were assigned to one of three groups according to the amount of prestimulus total alpha activity, and distinct differences of the event-related EEG dynamics between groups were observed. While all groups exhibited an event-related increase in phase-locked (evoked) alpha activity, only individuals with sustained prestimulus alpha activity showed alpha-blocking, that is, a considerable decrease of poststimulus non-phase-locked alpha activity. In contrast, individuals without observable prestimulus total alpha activity showed a concurrent increase of phase-locked and non-phase-locked alpha activity after stimulation. Data from this group seems to be in favor of an additive event-related neuronal response without alpha-blocking. However, the dissociable EEG dynamics of total and evoked alpha activities together with a complementary simulation analysis indicated a partial event-related reorganization of ongoing brain activity. We conclude that both partial phase-resetting and partial additive power contribute dynamically to the generation of ERPs. The prestimulus brain state exerts a prominent influence on event-related brain responses.
KW - Additive power
KW - Alpha activity
KW - EEG
KW - ERP
KW - Phase-resetting
UR - http://www.scopus.com/inward/record.url?scp=34347261697&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34347261697&partnerID=8YFLogxK
U2 - 10.1016/j.ijpsycho.2007.03.002
DO - 10.1016/j.ijpsycho.2007.03.002
M3 - Article
C2 - 17428561
AN - SCOPUS:34347261697
VL - 65
SP - 58
EP - 68
JO - International Journal of Psychophysiology
JF - International Journal of Psychophysiology
SN - 0167-8760
IS - 1
ER -