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Forschungsdatenbank PMU-SQQUID

Visual P2 component is related to theta phase-locking.
Freunberger, R; Klimesch, W; Doppelmayr, M; Höller, Y;
Neurosci Lett. 2007; 426(3): 181-186.
Originalarbeiten (Zeitschrift)

PMU-Autor/inn/en

Höller Yvonne

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.


Useful keywords (using NLM MeSH Indexing)

Adult

Brain/physiology*

Evoked Potentials/physiology*

Female

Humans

Male

Theta Rhythm*


Find related publications in this database (Keywords)

theta
oscillations
PLI
total power
phase-locking