Discrimination between phase-locked and non-phase-locked event-related EEG activity.
Differentiation between phase-locked and non-phase-locked event-related EEG activity is an important task in the evaluation of event-related EEG activity. Event-related changes of EEG activity such as event-related desynchronization (ERD) or event-related synchronization (ERS) can be quantified by either instantaneous band power or intertrial variance calculations. In the former case the ERD or ERS can be masked by an event-related potential while in the latter it is not. Examples from sensory stimulation and movement experiments, where the ERD (ERS) is calculated by both methods, are shown and discussed.
Kalcher
J
J
Department of Medical Informatics, Graz University of Technology, Austria.
Pfurtscheller
G
G
D000513:Alpha Rhythm; D000704:Analysis of Variance; D001931:Brain Mapping; D004558:Electric Stimulation; D004569:Electroencephalography; D005074:Evoked Potentials, Visual; D006801:Humans; D010775:Photic Stimulation; D012815:Signal Processing, Computer-Assisted