Multichannel EEG fields during and without visual input: frequency domain model source locations and dimensional complexities.
Neurosci Lett
; 226(1): 49-52, 1997 Apr 18.
Article
en En
| MEDLINE
| ID: mdl-9153639
ABSTRACT
27-Channel EEG potential map series were recorded from 12 normals with closed and open eyes. Intracerebral dipole model source locations in the frequency domain were computed. Eye opening (visual input) caused centralization (convergence and elevation) of the source locations of the seven frequency bands, indicative of generalized activity; especially, there was clear anteriorization of alpha-2 (10.5-12 Hz) and beta-2 (18.5-21 Hz) sources (alpha-2 also to the left). Complexity of the map series' trajectories in state space (assessed by Global Dimensional Complexity and Global OMEGA Complexity) increased significantly with eye opening, indicative of more independent, parallel, active processes. Contrary to PET and fMRI, these results suggest that brain activity is more distributed and independent during visual input than after eye closing (when it is more localized and more posterior).
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Encéfalo
/
Electroencefalografía
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Movimientos Oculares
Límite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Neurosci Lett
Año:
1997
Tipo del documento:
Article
País de afiliación:
Suiza