Phase information in visual evoked potentials

Micheli-Tzanakou, E; Pavlopoulos, S

dc.contributor.author	Micheli-Tzanakou, E	en
dc.contributor.author	Pavlopoulos, S	en
dc.date.accessioned	2014-03-01T01:13:15Z
dc.date.available	2014-03-01T01:13:15Z
dc.date.issued	1997	en
dc.identifier.issn	01485598	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12394
dc.subject	Noninvasive diagnosis	en
dc.subject	Periodicity	en
dc.subject	Phase information	en
dc.subject	Spectral analysis	en
dc.subject	Visual evoked potentials	en
dc.subject.other	article	en
dc.subject.other	brain electrophysiology	en
dc.subject.other	controlled study	en
dc.subject.other	electrodiagnosis	en
dc.subject.other	evoked visual response	en
dc.subject.other	human	en
dc.subject.other	human experiment	en
dc.subject.other	neurologic disease	en
dc.subject.other	neurophysiology	en
dc.subject.other	periodicity	en
dc.subject.other	Alzheimer Disease	en
dc.subject.other	Artifacts	en
dc.subject.other	Electrophysiology	en
dc.subject.other	Evoked Potentials, Visual	en
dc.subject.other	Fourier Analysis	en
dc.subject.other	Humans	en
dc.subject.other	Neurophysiology	en
dc.subject.other	Observer Variation	en
dc.subject.other	Periodicity	en
dc.subject.other	Photic Stimulation	en
dc.subject.other	Sensitivity and Specificity	en
dc.subject.other	Signal Processing, Computer-Assisted	en
dc.subject.other	Single-Blind Method	en
dc.title	Phase information in visual evoked potentials	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/A:1022832520612	en
heal.identifier.secondary	http://dx.doi.org/10.1023/A:1022832520612	en
heal.publicationDate	1997	en
heal.abstract	The Visual Evoked Potential (VEP) is an electrophysiological commonly used test in investigating various neurophysiological disorders. Through the years many methods have been developed but there are not many objective criteria in distinguishing a normal VEP waveform from an abnormal. In this communication we use the phase characteristics of the power spectrum as a criterion of distinguishing normals and abnormals. From our analysis, it was shown that the phase spectrum of a VEP has a certain periodicity in the 0- to 40-Hz region. By studying these periodicities we were able to determine the range of the period that characterizes normal and abnormal populations and to establish an experimental method for objectively examining any kind of VEP waveforms.	en
heal.journalName	Journal of Medical Systems	en
dc.identifier.doi	10.1023/A:1022832520612	en
dc.identifier.volume	21	en
dc.identifier.issue	4	en
dc.identifier.spage	219	en
dc.identifier.epage	227	en