T
Tamer Demiralp
Researcher at Istanbul University
Publications - 128
Citations - 5237
Tamer Demiralp is an academic researcher from Istanbul University. The author has contributed to research in topics: Electroencephalography & Oddball paradigm. The author has an hindex of 35, co-authored 119 publications receiving 4806 citations. Previous affiliations of Tamer Demiralp include Otto-von-Guericke University Magdeburg & Scientific and Technological Research Council of Turkey.
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Journal ArticleDOI
Human EEG gamma oscillations in neuropsychiatric disorders.
TL;DR: A hypothesis of a gamma axis of these disorders mainly based on the significance of gamma oscillations for memory matching is formulated, probably reflecting both cortical excitation and perceptual distortions such as déjà vu phenomena frequently observed in epilepsy.
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Alpha rhythm of the EEG modulates visual detection performance in humans.
Tolgay Ergenoglu,Tamer Demiralp,Zubeyir Bayraktaroglu,Mehmet Ergen,Huseyin Beydagi,Yağız Üresin +5 more
TL;DR: 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.
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P300-response: possible psychophysiological correlates in delta and theta frequency channels. A review.
TL;DR: A working hypothesis is derived assuming that delta responses are mainly involved in signal matching, decision making and surprise, whereas theta responses are more related to focused attention and signal detection.
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Gamma amplitudes are coupled to theta phase in human EEG during visual perception.
Tamer Demiralp,Zubeyir Bayraktaroglu,Daniel Lenz,Stefanie Junge,Niko A. Busch,Burkhard Maess,Mehmet Ergen,Christoph Herrmann +7 more
TL;DR: These data are the first scalp-recorded human EEG recordings revealing a relationship between the gamma amplitude and the phase of theta oscillations, supporting the first assumption of the above-mentioned theory and interestingly, the involved frequencies revealed a 7:1 ratio.
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Comparative analysis of event-related potentials during Go/NoGo and CPT: Decomposition of electrophysiological markers of response inhibition and sustained attention
Elif Kirmizi-Alsan,Zubeyir Bayraktaroglu,Hakan Gurvit,Yasemin H. Keskin,Murat Emre,Tamer Demiralp +5 more
TL;DR: The results suggest that theta component reflects response inhibition in both GNG and CPT, whereas delta component reflects the more demanding sustained attention requirement of the CPT.