title: Single trial ERP reading based on parallel factor analysis.
abstract: The extraction of task-related single trial ERP features has recently gained much interest, in particular in simultaneous EEG-fMRI applications. In this study, a specific decomposition known as parallel factor analysis (PARAFAC) was used, in order to retrieve the task-related activity from the raw signals. Using visual detection task data, acquired in normal circumstances and simultaneously with fMRI, differences between distinct task-related conditions can be captured in the trial signatures of specific PARAFAC components when applied to ERP data arranged in Channels × Time × Trials arrays, but the signatures did not correlate with the fMRI data. Despite the need for parameter tuning and careful preprocessing, the approach is shown to be successful, especially when prior knowledge about the expected ERPs is incorporated.
authors.affiliation: Department of Electrical Engineering, ESAT-SCD, Katholieke Universiteit Leuven, Leuven, Belgium. katrien.vanderperren@esat.kuleuven.be
authors.forename: Katrien
authors.initials: K
authors.lastname: Vanderperren
authors.forename: Bogdan
authors.initials: B
authors.lastname: Mijović
authors.forename: Nikolay
authors.initials: N
authors.lastname: Novitskiy
authors.forename: Bart
authors.initials: B
authors.lastname: Vanrumste
authors.forename: Peter
authors.initials: P
authors.lastname: Stiers
authors.forename: Bea R H
authors.initials: BR
authors.lastname: Van den Bergh
authors.forename: Lieven
authors.initials: L
authors.lastname: Lagae
authors.forename: Stefan
authors.initials: S
authors.lastname: Sunaert
authors.forename: Johan
authors.initials: J
authors.lastname: Wagemans
authors.forename: Sabine
authors.initials: S
authors.lastname: Van Huffel
authors.forename: Maarten
authors.initials: M
authors.lastname: De Vos
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male