On the rhythmicity of quadratic phase coupling in the tracé alternant EEG in healthy neonates.
The time-variant quadratic phase coupling (QPC) in trace alternant (TA) EEG patterns in healthy full-term neonates (quiet sleep) was investigated by means of time-variant bispectral analysis. The frequency plain 1-1.5 Hz <=> 3.5-4.5 Hz was used as the region-of-interest. QPC rhythms with a frequency of approximately 0.1 Hz were found in all neonates (n = 6). It can be demonstrated that the QPC rhythm of the TA is generated by a pattern-spanning time-variant phase-locking process characterising early functional interactions in the immature brain.
Schwab
Karin
K
Institut of Medical Statistics, Computer Sciences and Documentation, Medical Faculty of the Friedrich Schiller University Jena, 07740 Jena, Germany.
Putsche
Peter
P
Eiselt
Michael
M
Helbig
Marko
M
Witte
Herbert
H
D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography / Q000379:methods*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010507:Periodicity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013997:Time Factors