Event-related desynchronization (ERD) of sensorimotor rhythms in the alpha and beta bands is considered an indicator of cortical activation during motor preparation and execution. Event-related synchronization (ERS) of the beta rhythms, occurring after movement termination, is considered a correlate of corticospinal inhibition. We evaluated the ERD/ERS pattern to self-paced voluntary movement, using 29 channel EEG in a group of 9 dystonic patients (5 f, 4 m; age 36.8 ± 8.5 years) (4 focal, 2 multifocal, 1 hemidystonia, 2 writer's cramp). Data were compared with a group of normal subjects of similar age. Sensorimotor ERD during movement preparation and execution was similar in the two groups, while post-movement beta ERS was reduced in dystonic patients compared to normal subjects. These results are consistent with the hypothesis of a reduced efficiency of inhibitory circuits in dystonia.
|Issue number||4 SUPPL.|
|Publication status||Published - 2000|
ASJC Scopus subject areas
- Clinical Neurology