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Spatiotemporal patterns of beta desynchronization and gamma synchronization in corticographic data during self-paced movement
July 2003
July 2003
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Abstract
To study the spatiotemporal pattern of event-related desynchronization (ERD) and event-related
synchronization (ERS) in electrocorticographic (ECoG) data with closely spaced electrodes.
Four patients with epilepsy performed self-paced hand movements. The ERD/ERS was quantified
and displayed in the form of time-frequency maps.
In all subjects, a significant beta ERD with embedded gamma ERS was found.
Self-paced movement is accompanied not only by a relatively widespread mu and beta
ERD, but also by a more focused gamma ERS in the 60-90 Hz frequency band.