RT Journal Article
SR Electronic
T1 Multiway Canonical Correlation Analysis of Brain Signals
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 344960
DO 10.1101/344960
A1 Alain de Cheveigné
A1 Giovanni M. Di Liberto
A1 Dorothée Arzounian
A1 Daniel D.E. Wong
A1 Jens Hjortkjær
A1 Søren Fuglsang
A1 Lucas C. Parra
YR 2018
UL http://biorxiv.org/content/early/2018/06/12/344960.abstract
AB Brain signals recorded with electroencephalography (EEG), magnetoencephalography (MEG) and related techniques often have poor signal-to-noise ratio due to the presence of multiple competing sources and artifacts. A common remedy is to average over repeats of the same stimulus, but this is not applicable for temporally extended stimuli that are presented only once (speech, music, movies, natural sound). An alternative is to average responses over multiple subjects that were presented with the same identical stimuli, but differences in geometry of brain sources and sensors reduce the effectiveness of this solution. Multiway canonical correlation analysis (MCCA) brings a solution to this problem by allowing data from multiple subjects to be fused in such a way as to extract components common to all. This paper reviews the method, offers application examples that illustrate its effectiveness, and outlines the caveats and risks entailed by the method.