Beta rebound after different types of motor imagery in man.
Neurosci Lett
; 378(3): 156-9, 2005 Apr 22.
Article
en En
| MEDLINE
| ID: mdl-15781150
ABSTRACT
We investigated the behavior of short-lasting beta bursts (beta rebound, beta ERS) induced after imagination of hand, foot or tongue movement. Nine able-bodied subjects were asked to imagine one type of movement following the presentation of a visual cue stimulus. EEG was recorded from 60 closely spaced electrodes placed over frontal, central and parietal areas. Spatiotemporal ERD/ERS patterns were evaluated in form of time-frequency maps. Seven out of nine subjects displayed a significant short-lasting beta power increase (beta rebound) after termination of imagery of movement of both feet in the frequency range of 23-29Hz with a clear maximum at the vertex. In contrast, only two subjects displayed a clear beta rebound at the vertex after imagery of one of the hands, although five exhibited a significant beta rebound at the contralateral side of the head. None showed a beta rebound after tongue motor imagery. The midcentrally located beta rebound is interpreted as an electrophysiological correlate of a simultaneous "resetting" of overlapping neural networks in the foot representation areas and the SMA.
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Banco de datos:
MEDLINE
Asunto principal:
Ritmo beta
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Relojes Biológicos
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Potenciales Evocados
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Imaginación
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Corteza Motora
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Movimiento
Límite:
Adult
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Humans
Idioma:
En
Revista:
Neurosci Lett
Año:
2005
Tipo del documento:
Article