Application of Brain Oscillations in Neuropsychiatric by E. Başar, C. Başar-Eroĝlu, A. Özerdem, P.M. Rossini and G.G.

By E. Başar, C. Başar-Eroĝlu, A. Özerdem, P.M. Rossini and G.G. Yener (Eds.)

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Additional info for Application of Brain Oscillations in Neuropsychiatric Diseases: Selected Papers from “Brain Oscillations in Cognitive Impairment and Neurotransmitters” Conference, Istanbul, Turkey, 29 April–1 May 2011

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13 shows mean Z values for theta frequency range upon application of “target” stimuli for all electrode pairs. Both figures show the mean Z values for healthy subjects (red bars), untreated AD subjects (green bars), and treated AD subjects (blue bars). Fig. 13 shows that the healthy subjects had higher theta response coherence compared to both untreated and treated AD subjects upon application of target stimuli for all electrode pairs. The mean Z value of healthy subjects is 30–40% higher than AD patients in most of the electrode pairs upon application of “target” stimuli.

Importance of temporal coherence It is suggested that such integrative brain functions combine the actions of multiple oscillations and are a necessity for temporal coherence of perceptions and actions (Bas¸ar, 2006). , 2001a,b; Busza´ki and Draguhn, 2004; Bas¸ar, 2008). 5. 1. Multiple oscillations The present report clearly demonstrates that it is obligatory to apply the method of oscillations in Phase-locked activity is suggested to include all types of event-related brain potentials. The averaging procedure is usually applied to quantify the 45 phase-locked activity, whereby the phase-locked responses are enhanced and non-phase-locked ones are attenuated.

O Oscillatory responses to both target and nontarget stimuli are manifestations of working memory (WM) processes. Therefore, the coherence decrease in response to both types of stimuli indicates inadequate connectivity between different parts of the brain during a cognitive process, in comparison to pure sensory signal processing. 7. Event-related delta, theta, and gamma oscillations in schizophrenia patients during N-back working memory tasks A more differentiated visual event-related response paradigm in comparison to a simple oddball paradigm was applied to healthy subjects and schizophrenia patients by Schmiedt et al.

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