caa a22 4500 445295120 CHVBK 20180317142539.0 cr unu---uuuuu 170323e20100601xx s 000 0 eng 10.1007/s11571-010-9106-0 doi (NATIONALLICENCE)springer-10.1007/s11571-010-9106-0 A new interpretation of P300 responses upon analysis of coherences [Elektronische Daten] [Bahar Güntekin, Erol Başar] Previous studies on cognitive dynamics showed that oscillatory responses of P300 are composed of mainly delta and theta responses. In the present study, for the first time, the long-distance intra-hemispheric event related coherence (auditory oddball paradigm) and evoked coherence (simple sound) were compared in order to evaluate the effects of cognitive tasks on the long-distance coherences. Seventeen healthy subjects (8 female, 9 male) were included in the study. The coherence was analyzed for delta (1-3.5Hz), theta (4-7.5Hz) and alpha (8-13Hz) frequency ranges for (F3-P3, F4-P4, F3-T7, F4-T8, F3-O1, F4-O2) electrode pairs. The coherence to target responses were higher than the non-target and simple auditory response coherence. This difference is significant for the delta coherence for both hemispheres and for theta coherences over the left hemisphere. The highest coherences were recorded at fronto-temporal locations for all frequency bands (delta, theta, alpha). Furthermore, fronto-parietal coherences were higher than the fronto-occipital coherences for all frequency bands (delta, theta, alpha).These results show that the fronto-temporal and fronto-parietal connections are most relevant for the identification of the target signal. This analysis open the way for a new interpretation of dynamic localization results during cognitive tasks. Springer Science+Business Media B.V., 2010 Event related coherence nationallicence Brain oscillations nationallicence P300 nationallicence Oddball nationallicence Delta nationallicence Theta nationallicence Alpha nationallicence Güntekin Bahar Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul Kultur University, Istanbul, Turkey aut Başar Erol Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul Kultur University, Istanbul, Turkey aut Cognitive Neurodynamics Springer Netherlands 4/2(2010-06-01), 107-118 1871-4080 4:2<107 2010 4 11571 https://doi.org/10.1007/s11571-010-9106-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11571-010-9106-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Güntekin Bahar Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul Kultur University, Istanbul, Turkey aut NATIONALLICENCE 700 1- Başar Erol Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul Kultur University, Istanbul, Turkey aut NATIONALLICENCE 773 0- Cognitive Neurodynamics Springer Netherlands 4/2(2010-06-01), 107-118 1871-4080 4:2<107 2010 4 11571 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer