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ASEO: a method for the simultaneous estimation of single-trial event-related potentials and ongoing brain activities
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Systems and Control. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
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2009 (English)In: IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, E-ISSN 1558-2531, Vol. 56, no 1, 111-121 p.Article in journal (Refereed) Published
Abstract [en]

Cognitive functions are often studied by recording electric potentials from the brain over repeated presentations of a sensory stimulus or repeated performance of a motor action. Each repetition is called a trial. Recent work has demonstrated that contrary to the traditional view, the event-related potential (ERP) can vary from trial to trial and the background ongoing activity often contains rich information about the cognitive state of the brain. Based on such a variable signal plus ongoing activity model, an iterative parameter estimation method is proposed in which both the single-trial parameters of the ERP and the autoregressive representation of the ongoing activity are obtained simultaneously. This technique, referred to as the analysis of single-trial ERP and ongoing activities method, is first tested on simulation examples, and then applied to the local field potential recordings from monkeys performing a visuomotor task.

Place, publisher, year, edition, pages
2009. Vol. 56, no 1, 111-121 p.
Keyword [en]
Autoregressive (AR), electroencephalogram (EEG), event-related potential (ERP), local field potential (LFP), maximum-likelihood estimate (MLE), ongoing brain activity
National Category
Computer and Information Science
Identifiers
URN: urn:nbn:se:uu:diva-104425DOI: 10.1109/TBME.2008.2008166ISI: 000263640900014OAI: oai:DiVA.org:uu-104425DiVA: diva2:219783
Available from: 2009-05-28 Created: 2009-05-28 Last updated: 2017-12-13Bibliographically approved

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Stoica, Peter

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