J. Kalcher et G. Pfurtscheller, DISCRIMINATION BETWEEN PHASE-LOCKED AND NON-PHASE-LOCKED EVENT-RELATED EEC ACTIVITY, Electroencephalography and clinical neurophysiology, 94(5), 1995, pp. 381-384
Differentiation between phase-locked and non-phase-locked event-relate
d EEG activity is an important task in the evaluation of event-related
EEG activity. Event-related changes of EEG activity such as event-rel
ated desynchronization (ERD) or event-related synchronization (ERS) ca
n be quantified by either instantaneous band power or intertrial varia
nce calculations. In the former case the ERD or ERS can be masked by a
n event-related potential while in the fatter it is not. Examples from
sensory stimulation and movement experiments, where the ERD (ERS) is
calculated by both methods, are shown and discussed.