A simple reason why beamformer may (not) remove the tACS-induced artifact in MEG

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Organisaatiot

Kuvaus

Transcranial alternating current simulation (tACS) combined synchronously
with magnetoencephalography (MEG) could be a useful tool for studying brain oscillations and their relation to cognitive functions, but the method, however, suffers from large tACS-induced MEG artifacts. Conventional beamformer methods have been suggested for removing - or at least reducing - the artifact, but its functioning principle is not yet fully understood. We demonstrate the reason behind the beamformer’s ability to remove/reduce the tACS artifact (and other mutually correlated noise sources) with simple theoretical reasoning and simulations. In addition, at odds with previous suggestions, we show how the imperfections of this removal method could be explained with basic linear algebra without any need to consider nonlinear effects.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivute66-e67
Sivumäärä2
JulkaisuBrain Stimulation
Vuosikerta10
Numero4
TilaJulkaistu - elokuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 16408890