Spatiotemporal patterns of beta desynchronization and gamma synchronization in corticographic data during self-paced movement.
OBJECTIVE
To study the spatiotemporal pattern of event-related desynchronization (ERD) and event-related synchronization (ERS) in electrocorticographic (ECoG) data with closely spaced electrodes.


METHODS
Four patients with epilepsy performed self-paced hand movements. The ERD/ERS was quantified and displayed in the form of time-frequency maps.


RESULTS
In all subjects, a significant beta ERD with embedded gamma ERS was found.


CONCLUSIONS
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.
Pfurtscheller
G
G
Department of Medical Informatics, Institute of Biomedical Engineering, University of Technology Graz, Inffeldgasse 16a/II, A-8010 Graz, Austria. pfurtscheller@tugraz.at
Graimann
B
B
Huggins
J E
JE
Levine
S P
SP
Schuh
L A
LA
D000328:Adult; D001611:Beta Rhythm / Q000379:methods*; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000503:physiopathology; D003344:Cortical Synchronization / Q000379:methods*; D004566:Electrodes; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006225:Hand / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D010812:Physical Stimulation; D012640:Seizures / Q000503:physiopathology*; D013997:Time Factors