[The dynamic localization of a dipole source of the alpha rhythm in the human brain].
In 11 subjects the dynamic localization (with 2-ms step) of the equivalent current dipole of alpha rhythm during travelling alpha waves was studied using one-dipole 3-layered spherical head model and MRI. The dipole was localized in the occipital cortex and during the development of a single alpha wave it shifted in one or another direction while dipole's moment revealed fan-like rotation mainly in sagittal and horizontal planes. The results obtained indicate changing localization of the alpha-rhythm source in the region corresponding to striate cortex. They seem to prove scanning hypothesis that is still under discussion.
D000328:Adult; D000513:Alpha Rhythm / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D001921:Brain / Q000033:anatomy & histology; D001931:Brain Mapping / Q000295:instrumentation / Q000379:methods; D004566:Electrodes; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008959:Models, Neurological; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted; D014793:Visual Cortex / Q000502:physiology*