Characterization of evoked and induced activity in EEG and assessment of intertrial variability

Michalopoulos, K; Iordanidou, V; Giannakakis, GA; Nikita, KS; Zervakis, M

dc.contributor.author	Michalopoulos, K	en
dc.contributor.author	Iordanidou, V	en
dc.contributor.author	Giannakakis, GA	en
dc.contributor.author	Nikita, KS	en
dc.contributor.author	Zervakis, M	en
dc.date.accessioned	2014-03-01T02:52:55Z
dc.date.available	2014-03-01T02:52:55Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36147
dc.subject.other	Brain activation	en
dc.subject.other	Brain mechanisms	en
dc.subject.other	Brain regions	en
dc.subject.other	Brain response	en
dc.subject.other	Frequency domains	en
dc.subject.other	Induced activity	en
dc.subject.other	Statistical measures	en
dc.subject.other	Biomedical engineering	en
dc.subject.other	Brain	en
dc.subject.other	Chemical activation	en
dc.subject.other	Brain computer interface	en
dc.title	Characterization of evoked and induced activity in EEG and assessment of intertrial variability	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/IWBE.2011.6079037	en
heal.identifier.secondary	http://dx.doi.org/10.1109/IWBE.2011.6079037	en
heal.identifier.secondary	6079037	en
heal.publicationDate	2011	en
heal.abstract	Brain response to an internal or external event, is composed by the superposition of evoked and induced oscillatory activity, which reflect different brain mechanisms involved. Identification of such activations could serve for diagnostic purposes and provide useful tools for brain computer interfaces through insight on the activation of different brain regions. In this paper we study several statistical measures that have been proposed for identifying the nature of the involved activations. All these measures are based on some mean of an appropriate signal attribute over trials in the time/ frequency domain and do not characterize the variability across trials. In order to quantify trial-to-trial variability we consider a measure based on entropy, characterizing the distribution of power across trials. The results indicate that brain activations can be characterized and differentiated by their behavior from trial to trial. © 2011 IEEE.	en
heal.journalName	10th International Workshop on Biomedical Engineering, BioEng 2011	en
dc.identifier.doi	10.1109/IWBE.2011.6079037	en