Event-related EEG/MEG synchronization and desynchronization: basic principles

  title={Event-related EEG/MEG synchronization and desynchronization: basic principles},
  author={Gert Pfurtscheller and F. Lopes da Silva},
  journal={Clinical Neurophysiology},
Across-trial averaging of event-related EEG responses and beyond.
Functional brain imaging based on ERD/ERS
Time-frequency microstructure of event-related electro-encephalogram desynchronisation and synchronisation
A new method is presented for the analysis of event-related EEG phenomena, in particular event related desynchronisation (ERD) and event related synchronisation (ERS) related to a voluntary movement;
Scalp EEG Continuous Space ERD/ERS Quantification
A 2D spatially continuous extension of the Phase Locking Factor (PLF) metric for ERD/ERS quantification is proposed, called PLF Field (PLFF), based on measuring spatial variations of the EEG phase, which may provide additional information in studies of neuronal synchronization using EEG.
Modulation of event-related desynchronization during kinematic and kinetic hand movements
The experimental results suggest that the strength of ERD may reflect the time differentiation of hand postures in motor planning process or the variation of proprioception resulting from hand movements, rather than the motor command generated in the down stream, which recruits a group of motor neurons.
Event related desynchronization: use as a neurophysiologic marker is restricted
It is shown that the occurrence of alpha blocking or event-related desynchronization (ERD) strongly depends on the amplitude and also on the phase angle of alpha activity at the stimulus onset, and important precaution is needed when using the ERD as a cognitive or pathological marker.
Induced Oscillations in the Alpha Band: Functional Meaning
The induced oscillations (ERS) are dominant in the 10‐ to 13‐Hz band and very likely mediated by thalamic gating.
Combining Event-Related Synchronization and Event-Related Desynchronization with Fuzzy C-Means to Classify Motor Imagery-Induced EEG Signals
In this study, C3 and C4 electrode were distributed on the scalp surface of a participant to record the event-related potential (left and right hand movement) produced during testing, and a fuzzy C-means (FCM) classifier was used to classify eigenvalues, grouping the features of left andright hand movement in EEG signals.
A Time-Frequency Analysis of Event-Related Desynchronization/Synchronization Based on
The Gabor filter is used in the algorithm to extract the amplitude information of the EEG in each frequency band, then the inter-trail variance method is used to quantify the ERD/ERS and the time-frequency map is shown to make a comprehensive analysis of hand motor imagery.


Event-related synchronization (ERS): an electrophysiological correlate of cortical areas at rest.
  • G. Pfurtscheller
  • Biology, Psychology
    Electroencephalography and clinical neurophysiology
  • 1992
Discrimination between phase-locked and non-phase-locked event-related EEG activity.
Event-related cortical desynchronization detected by power measurements of scalp EEG.
Event-related synchronization (ERS) in the alpha band--an electrophysiological correlate of cortical idling: a review.
Graphical display and statistical evaluation of event-related desynchronization (ERD).
  • G. Pfurtscheller
  • Psychology
    Electroencephalography and clinical neurophysiology
  • 1977