Phase coupling between different motor areas during tongue-movement imagery.
Neurosci Lett
; 369(1): 50-4, 2004 Oct 07.
Article
en En
| MEDLINE
| ID: mdl-15380306
Motor imagery can be accompanied by an enhancement of brain oscillations (event-related synchronization, ERS) within specific frequency bands. To characterize the neuronal couplings involved during these prominent power changes, we have chosen a certain coupling measure that bears directly on the issue of transient cortical connections. Specifically, we applied for the first time the phase-locking value to investigate the phase coupling of sensorimotor rhythms in different motor areas during tongue-movement imagery. Most interesting, we showed that robust neuronal couplings within the alpha frequency range are established between the midcentral position and bilateral central electrode positions, overlying the supplementary motor area (SMA) and the right and left primary sensorimotor area, respectively. In contrast, no direct linkage was present between sensorimotor rhythms in both hemispheres. We suggest that the coupling results point at a separate interplay between neural networks within the SMA and lateralized networks in primary sensorimotor areas of each hemisphere during motor imagery.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Percepción
/
Lengua
/
Corteza Motora
/
Movimiento
Límite:
Adult
/
Humans
Idioma:
En
Revista:
Neurosci Lett
Año:
2004
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Irlanda