Alpha phase synchronization predicts P1 and N1 latency and amplitude size.
The oscillatory phase-resetting model predicts that event-related potential (ERP) components are generated by a superposition of evoked oscillations with different frequencies. We investigate this question in a memory task in which human subjects had to retrieve a verbal label in response to the presentation of a picture. The results show that (i) evoked oscillations in the delta, theta, alpha and beta range undergo a significant phase resetting and (ii) become synchronized in absolute phase during small time windows that (iii) coincide with the latencies of the P1-N1 complex. Our conclusion is that the latencies of ERP components can be predicted at least in part by phase synchronization between frequencies.
Gruber
Walter R
WR
Department of Physiological Psychology, University of Salzburg, Austria. walter.r.gruber@sbg.ac.at
Klimesch
Wolfgang
W
Sauseng
Paul
P
Doppelmayr
Michael
M
D000328:Adult; D000513:Alpha Rhythm; D001245:Association Learning / Q000502:physiology; D001921:Brain / Q000502:physiology; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008568:Memory / Q000502:physiology; D008960:Models, Psychological; D021641:Recognition, Psychology / Q000502:physiology; D013826:Theta Rhythm