Single-trial event-related potential extraction through one-unit ICA-with-reference
2016 (English)In: Journal of Neural Engineering, ISSN 1741-2560, E-ISSN 1741-2552, Vol. 13, no 6, 066010Article in journal (Refereed) Published
Objective. In recent years, ICA has been one of the more popular methods for extracting event-related potential (ERP) at the single-trial level. It is a blind source separation technique that allows the extraction of an ERP without making strong assumptions on the temporal and spatial characteristics of an ERP. However, the problem with traditional ICA is that the extraction is not direct and is time-consuming due to the need for source selection processing. In this paper, the application of an one-unit ICA-with-Reference (ICA-R), a constrained ICA method, is proposed.
Approach. In cases where the time-region of the desired ERP is known a priori, this time information is utilized to generate a reference signal, which is then used for guiding the one-unit ICA-R to extract the source signal of the desired ERP directly.
Main results. Our results showed that, as compared to traditional ICA, ICA-R is a more effective method for analysing ERP because it avoids manual source selection and it requires less computation thus resulting in faster ERP extraction.
Significance. In addition to that, since the method is automated, it reduces the risks of any subjective bias in the ERP analysis. It is also a potential tool for extracting the ERP in online application.
Place, publisher, year, edition, pages
2016. Vol. 13, no 6, 066010
constrained independent component analysis, event-related potential, independent component analysis, one-unit ICA-R, P300, single-trial extraction, Blind source separation, Extraction, Risk assessment, Signal processing, Event related potentials, Single trial
Signal Processing Neurosciences
IdentifiersURN: urn:nbn:se:hj:diva-34455DOI: 10.1088/1741-2560/13/6/066010ISI: 000386449300003PubMedID: 27739404ScopusID: 2-s2.0-85002170685Local ID: HHJCHILDISOAI: oai:DiVA.org:hj-34455DiVA: diva2:1058488