Visual P2 component is related to theta phase-locking.
Neurosci Lett
; 426(3): 181-6, 2007 Oct 22.
Article
in En
| MEDLINE
| ID: mdl-17904744
ABSTRACT
In this study we investigated the hypothesis whether P2-related differences tested in a visual priming paradigm are associated with theta phase-locking. We recorded the EEG from 31 electrodes and calculated phase-locking index and total power differences for frequencies between 2 and 20 Hz. ERPs (event-related potentials) were analyzed for P1, N1 and P2 components. P2 showed strongest task-related amplitude differences between congruent and incongruent targets. A source analyses was performed for the P2 component using sLoreta that revealed local generators of the P2 in parieto-occipital regions. Phase-locking analyses showed specific effects in the theta range (4-6 Hz) appearing in time windows at around the P2 component. We draw the conclusion that phase-locked theta reflect top-down regulation processes mediating information between memory systems and is in part involved in the modulation of the P2 component.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Theta Rhythm
/
Brain
/
Evoked Potentials
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
Neurosci Lett
Year:
2007
Document type:
Article
Affiliation country:
Austria