title: Event-Related changes of band power and coherence: methodology and interpretation.
abstract: Event-related calculation of band power changes can be used to quantify event-related desynchronization, event-related synchronization, and event-related coherence (ERCoh). It is shown that in the case of a motor task especially, the ERCoh time course depends on the type of EEG derivation used, whereby referenced EEG data can result in a bilateral coherence increase, although both hemispheres generate independent sensorimotor rhythms. It is further shown that not only Rolandic mu rhythms but also central beta rhythms display a lack of interhemispheric linear phase coupling.
authors.affiliation: Department of Medical Informatics, Ludwig Boltzmann Institute for Medical Informatics and Neuroinformatics, Technical University Graz, Austria.
authors.forename: G
authors.initials: G
authors.lastname: Pfurtscheller
authors.forename: C
authors.initials: C
authors.lastname: Andrew
mesh_terms: D000513:Alpha Rhythm / Q000379:methods*; D003344:Cortical Synchronization / Q000379:methods*; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans; D009068:Movement / Q000502:physiology*