Functional coupling of human right and left cortical motor areas demonstrated with partial coherence analysis.
Although a linear correlation between oscillatory activities in the right and left motor cortices during movements has been shown in monkeys, there has been a debate whether scalp-recorded EEG coherence in human reflects a similar association. By applying partial coherence analysis, we demonstrated that interhemispheric coherence during movements cannot be explained by contamination from the occipital alpha rhythm or common reference signal. A significant increase of net interhemispheric communication in the beta1 band was shown during movements. We propose that the partial coherence method can be a useful tool to measure cortico-cortical functional coupling reliably.
Mima
T
T
Human Motor Control Section, NINDS, National Institutes of Health, Bethesda, MD 20892-1428, USA.
Matsuoka
T
T
Hallett
M
M
D000328:Adult; D003337:Corpus Callosum / Q000502:physiology; D004569:Electroencephalography / Q000379:methods*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008959:Models, Neurological; D009044:Motor Cortex / Q000502:physiology*; D009068:Movement / Q000502:physiology*