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dc.contributor.authorErgenoglu, T
dc.contributor.authorUresin, Y
dc.contributor.authorDemiralp, Tamer
dc.contributor.authorErgen, Mehmet
dc.contributor.authorBayraktaroglu, Zübeyir
dc.contributor.authorBeydagi, Hüseyin
dc.date.accessioned2021-03-02T22:35:33Z
dc.date.available2021-03-02T22:35:33Z
dc.date.issued2004
dc.identifier.citationErgenoglu T., Demiralp T., Bayraktaroglu Z., Ergen M., Beydagi H., Uresin Y., "Alpha rhythm of the EEG modulates visual detection performance in humans", COGNITIVE BRAIN RESEARCH, cilt.20, sa.3, ss.376-383, 2004
dc.identifier.issn0926-6410
dc.identifier.othervv_1032021
dc.identifier.otherav_0d942666-a1a4-4bfd-8361-b59c694343ab
dc.identifier.urihttp://hdl.handle.net/20.500.12627/14719
dc.identifier.urihttps://doi.org/10.1016/j.cogbrainres.2004.03.009
dc.description.abstractThe effects of the changes in the frequency spectrum of the electroencephalogram (EEG) on the perception of near-threshold visual stimuli and on the event-related potentials (ERPs) produced by these stimuli were investigated on 12 healthy volunteers. The stimulus intensity, at which each subject could detect 50% of the presented stimuli, was defined as the sensory threshold for that subject. Single ERP trials were separated into two groups: trials with detected and undetected stimuli. The ERPs and the average power spectra of the 1 s prestimulus periods were computed for both conditions. P300 amplitudes of the ERPs, and total power and relative band powers of the delta (0.5-4 Hz), theta (4-7.5 Hz), alpha (7.5-13 Hz), beta (13-30 Hz), and gamma (30-70 Hz) frequency bands of the prestimulus power spectra were measured. Between the two conditions, a specific difference was observed in the relative power of the alpha band, which was significantly lower before detected stimuli (p < 0.01) in line with significantly higher amplitudes of the ERPs (p < 0.001). These results show that short-lasting changes in brain's excitability state are reflected the relative alpha power of the EEG, which may explain significant variability in perceptual processes and ERP generation especially at boundary conditions such as sensory threshold. (C) 2004 Elsevier B.V. All rights reserved.
dc.language.isoeng
dc.subjectAlgoritmalar
dc.subjectYaşam Bilimleri
dc.subjectTemel Bilimler
dc.subjectMühendislik ve Teknoloji
dc.subjectSinirbilim ve Davranış
dc.subjectYaşam Bilimleri (LIFE)
dc.subjectNÖRO-GÖRÜNTÜLEME
dc.subjectBilgisayar Bilimleri
dc.subjectNEUROSCIENCES
dc.subjectMühendislik, Bilişim ve Teknoloji (ENG)
dc.subjectBilgisayar Bilimi
dc.subjectBİLGİSAYAR BİLİMİ, YAPAY ZEKA
dc.titleAlpha rhythm of the EEG modulates visual detection performance in humans
dc.typeMakale
dc.relation.journalCOGNITIVE BRAIN RESEARCH
dc.contributor.departmentİstanbul Üniversitesi , ,
dc.identifier.volume20
dc.identifier.issue3
dc.identifier.startpage376
dc.identifier.endpage383
dc.contributor.firstauthorID33266


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