Browsing by Author "Aktürk, Tuba"
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Abnormal cross frequency coupling of brain electroencephalographic oscillations related to visual oddball task in parkinson's disease with mild cognitive impairment
Bayraktaroğlu, Zübeyir; Aktürk, Tuba; Yener, Görsev; de Graaf, Tom A.; Hanoğlu, Lütfü; Yıldırım, Ebru; Hünerli Gündüz, Duygu; Kıyı, İlayda; Sack, Alexander T.; Babiloni, Claudio; Güntekin, Bahar (SAGE Publications Inc., 2023)Parkinson's disease (PD) is a movement disorder caused by degeneration in dopaminergic neurons. During the disease course, most of PD patients develop mild cognitive impairment (PDMCI) and dementia, especially affecting ... -
Abnormalities in auditory and visual cognitive processes are differentiated with theta responses in patients with Parkinson's disease with and without dementia
Güntekin, Bahar; Aktürk, Tuba; Yıldırım, Ebru; Helvacı Yılmaz, Nesrin; Hanoğlu, Lütfü; Yener, Görsev (Elsevier, 2020)The research on the abnormalities of event-related oscillations in Parkinson's disease (PD) was mostly studied with cognitively normal patients. The present study aims to show the adverse effects of cognitive decline in ... -
Abnormalities of cortical sources of resting state alpha electroencephalographic rhythms are related to education attainment in cognitively unimpaired seniors and patients with alzheimer's disease and amnesic mild cognitive impairment
Babiloni, Claudio C.; Ferri, Raffaele; Noce, Giuseppe; Lizio, Roberta; Lopez, Susanna; Lorenzo, Ivan; Panzavolta, Andrea; Soricelli, Andrea; Nobili, Flavio Mariano; Arnaldi, Dario; Famà, Francesco; Orzi, Francesco; Buttinelli, Carla; Giubilei, Franco; Cipollini, Virginia; Marizzoni, Moira; Güntekin, Bahar; Aktürk, Tuba; Hanoǧlu, Lütfü; Yener, Görsev G.; Özbek, Yağmur; Stocchi, Fabrizio; Vacca, Laura; Frisoni, Glovannl B.; del Percio, Claudio (NLM (Medline), 2021)In normal old (Nold) and Alzheimer's disease (AD) persons, a high cognitive reserve (CR) makes them more resistant and resilient to brain neuropathology and neurodegeneration. Here, we tested whether these effects may ... -
Age related differences in the recognition of facial expression: Evidence from EEG event-related brain oscillations
Aktürk, Tuba; İşoğlu-Alkaç, Ümmühan; Hanoǧlu, Lütfü; Güntekin, Bahar (Elsevier B.V., 2020)Facial Expression (FE) recognition is a major marker of emotional ability. Behavioral studies show that FE recognition ability decreases with aging. Studying how event-related brain oscillations change with normal aging ... -
Are there consistent abnormalities in event-related EEG oscillations in patients with Alzheimer's disease compared to other diseases belonging to dementia?
Güntekin, Bahar; Aktürk, Tuba; Arakaki, Xianghong; Bonanni, Laura; Del Percio, Claudio; Edelmayer, Rebecca; Farina, Francesca; Ferri, Raffaele; Hanoğlu, Lütfü; Kumar, Sanjeev; Lizio, Roberta; Lopez, Susanna; Murphy, Brian; Noce, Giuseppe; Randall, Fiona; Sack, Alexander T.; Stocchi, Fabrizio; Yener, Görsev; Yıldırım, Ebru; Babiloni, Claudio (John Wiley and Sons Inc, 2022)Cerebrospinal and structural-molecular neuroimaging in-vivo biomarkers are recommended for diagnostic purposes in Alzheimer’s disease (AD) and other dementias; however, they do not explain the effects of AD neuropathology ... -
Classification of Parkinson's disease with dementia using phase locking factor of event-related oscillations to visual and auditory stimuli
Tülay, Emine Elif; Yıldırım, Ebru; Aktürk, Tuba; Güntekin, Bahar (IOP Publishing Ltd, 2023)Objective. In the last decades, machine learning approaches have been widely used to distinguish Parkinson’s disease (PD) and many other neuropsychiatric diseases. They also speed up the clinicians and facilitate decision-making ... -
Cognitive impairment in parkinson's disease is reflected with gradual decrease of eeg delta responses during auditory discrimination
Güntekin, Bahar; Hanoğlu, Lütfü; Güner, Dilan; Helvacı Yılmaz, Nesrin; Çadırcı, Fadime; Mantar, Nagihan; Aktürk, Tuba; Emek Savaş, Derya Durusu; Özer, Feriha; Yener, Görsev; Başar, Erol (Frontiers Media Sa, 2018)Parkinson's disease (PD) is a neurodegenerative disease that is characterized by loss of dopaminergic neurons in the substantia nigra. Mild Cognitive impairment (MCI) and dementia may come along with the disease. New ... -
Comparison of the visual and auditory event related potentials of parkinson's disease epatients with and without cognitive impairment
Güner, Dilan; İsogğlu Alkaç, Ümmühan; Aktürk, Tuba; Hanoğlu, Lütfü; Güntekin, Bahar (Wiley, 2017)Auditory event related potentials (ERPs) and visual evoked potentials (VEPs) were recorded from eight patients with Parkinson's disease, before and after a single dose of apomorphine. To assess the treatment effects, the ... -
Delta oscillatory responses as a general electrophysiological biomarker for cognitive disorders
Güntekin, Bahar; Hanoğlu, Lütfü; Aktürk, Tuba; Güner, Dilan; Turp-Gölbaşı, Bilge; Yener, Görsev; Başar, Erol (Elsevier Science Bv, 2016)Background: In the last decade research on delta oscillatoryresponses invaded the literature. One of thefirst research on thisarea showed that delta responses increase upon cognitive load(Başar and Stampfer 1985). After ... -
The difference of mild cognitive impairment in Parkinson's disease from amnestic mild cognitive impairment: Deeper power decrement and no phase-locking in visual event-related responses
Yener, Görsev G.; Fide, Ezgi; Özbek, Yağmur; Emek Savaş, Derya Durusu; Aktürk, Tuba; Çakmur, Raif; Güntekin, Bahar (Elsevier Science Bv, 2019)Event-related oscillatory responses reflect the cognitive status in many neuropsychiatric conditions including mild cognitive impairment (MCI). In this study, a total of 30 patients with amnestic MCI (aMCI) and 25 patients ... -
Electrophysiological evidence of altered facial expressions recognition in Alzheimer's disease: A comprehensive ERP study
Fide, Ezgi; Ekmek Savaş, Derya Durusu; Aktürk, Tuba; Güntekin, Bahar; Hanoğlu, Lütfü; Yener, Görsev G. (Elsevier Ireland Ltd, 2019)Objectives: The present study aims to evaluate the amplitude and latency of event-related potentials (ERPs) P100, N170, VPP and N230 in individuals with Alzheimer's disease (AD) compared to healthy elderly controls, using ... -
Enhancing memory capacity by experimentally slowing theta frequency oscillations using combined EEG-tACS
Aktürk, Tuba; de Graaf, Tom A.; Güntekin, Bahar; Hanoğlu, Lütfü; Sack, Alexander T. (Nature Portfolio, 2022)he coupling of gamma oscillation (similar to 40+ Hz) amplitude to the phase of ongoing theta (similar to 6 Hz) oscillations has been proposed to be directly relevant for memory performance. Current theories suggest that ... -
Event-related delta and theta responses may reflect the valence discrimination in the emotional oddball task
Bölükbaş, Burcu; Aktürk, Tuba; Ardalı, Hilal; Dündar, Yasemin; Güngör, Ceren; Kahveci, Şaika; Güntekin, Bahar (Springer Science and Business Media Deutschland GmbH, 2023)How emotion and cognition interact is still a matter of debate. Investigation of this interaction in terms of the brain oscillatory dynamics appears to be an essential approach. To investigate this topic, we designed two ... -
Event-related EEG oscillatory responses elicited by dynamic facial expression
Aktürk, Tuba; de Graaf, Tom A.; Abra, Yasemin; Şahoğlu Göktaş, Sevilay; Özkan, Dilek; Kula, Aysun; Güntekin, Bahar (BMC, 2021)Background Recognition of facial expressions (FEs) plays a crucial role in social interactions. Most studies on FE recognition use static (image) stimuli, even though real-life FEs are dynamic. FE processing is complex and ... -
Immature event-related alpha dynamics in children compared with the young adults during inhibition shown by day-night stroop task
Güntekin, Bahar; Alptekin, Simay; Yıldırım, Ebru; Aktürk, Tuba; Uzunlar, Hakan; Çalışoğlu, Pervin; Eroğlu Ada, Figen; Atay, Enver; Ceran, Ömer (Frontiers Media SA, 2023)Introduction: Inhibitory control develops gradually from infancy to childhood and improves further during adolescence as the brain matures. Related previous studies showed the indispensable role of task-related alpha power ... -
Impairment in recognition of emotional facial expressions in Alzheimer's disease is represented by EEG theta and alpha responses
Güntekin, Bahar; Hanoǧlu, Lütfü; Aktürk, Tuba; Ruşen, Ece; Yıldırım, Ebru; Yener, Görsev (Blackwell Publishing Inc., 2019)Behavioral studies have shown that the recognition of facial expressions may be impaired in patients with Alzheimer's disease (AD). The identification and recognition of a facial expression might be represented by event-related ...
