Scientific Article – S. Hakan Uzunlar

Differential posterior alpha-beta EEG responses during visual memory encoding in children born with low birth weight compared to children born with normal birth weight

Aktürk, T., Ceran, Ö., Alptekin, S., Eroğlu Ada, F., Yıldırım, E., Uzunlar, H., Çalışoğlu, P., Atay, E., & Güntekin, B. (2026). Differential posterior alpha-beta EEG responses during visual memory encoding in children born with low birth weight compared to children born with normal birth weight. Heliyon, 12(12), e45166. https://doi.org/10.1016/j.heliyon.2026.e45166 Highlights ABSTRACT Children with low birth […]

Impaired event-related theta spectral coherence in emotional facial expression processing in neurodegenerative disorders

Uzunlar H, Duygun R, Kıyı-Atilla İ, Aktürk T, Yıldırım E, Helvacı Yılmaz N, Hanoğlu L, Sequeira H, Papo D, Zanin M, Babiloni C, Yener G and Güntekin B (2026) Impaired event-related theta spectral coherence in emotional facial expression processing in neurodegenerative disorders. Front. Hum. Neurosci. 20:1708832. doi: 10.3389/fnhum.2026.1708832 Abstract Introduction: The ability to recognize emotional […]

Demonstration of impaired facial emotion perception in temporal lobe epilepsy by theta responses in EEG

Nezir, G., Uzunlar, H., Aktürk, T., Güntekin, B., Özkara, Ç. (2025) Demonstration of impaired facial emotion perception in temporal lobe epilepsy by theta responses in EEG. International Journal of Psychophysiology. https://doi.org/10.1016/j.ijpsycho.2025.112578 Highlights Abstract Objective Temporale lobe and occipito-temporal cortical areas play an important role in facial emotion perception (FEP). FEP might be represented by event-related […]

Immature event-related alpha dynamics in children compared with the young adults during inhibition shown by day-night stroop task

Güntekin B, Alptekin S, Yıldırım E, Aktürk T, Uzunlar, H, Çalışoğlu P, Ada FE, Atay E and Ceran Ö (2023) Immature event-related alpha dynamics in children compared with the young adults during inhibition shown by day-night stroop task. Front. Hum. Neurosci. 17:1218559. https://doi.org/10.3389/fnhum.2023.1218559 Abstract Introduction: Inhibitory control develops gradually from infancy to childhood and improves […]

Reduced power and phase-locking values were accompanied by thalamus, putamen, and hippocampus atrophy in Parkinson’s disease with mild cognitive impairment: an event-related oscillation study

Hünerli-Gündüz, D., Özbek, Y., Uzunlar, H., Çavuşoğlu, B., Çolakoğlu, B. D., Ada, E., Güntekin, B., & Yener, G. (2023) Reduced power and phase-locking values were accompanied by thalamus, putamen, and hippocampus atrophy in Parkinson’s disease with mild cognitive impairment: an event-related oscillation study. Neurobiology of Aging; Elsevier BV. https://doi.org/10.1016/j.neurobiolaging.2022.10.001 ABSTRACT Parkinson’s disease (PD) is a […]

Theta and alpha oscillatory responses differentiate between six-to seven-year-old children and adults during successful visual and auditory memory encoding

The healthy maturation of the brain is one of the intriguing topics that need to be investigated to understand human brain and child development. The present study aimed to investigate the development of memory processes both for auditory and visual memory using electroencephalography (EEG)-Brain Dynamics methodologies. Sixteen healthy children between the ages of 6 and 7 years and eighteen healthy young adults (age: 21.32 ± 3.28 years) were included in the study. EEG was recorded from 18 channels during the visual and auditory memory paradigms. Two different subtests of the WISC-IV IQ test were applied to all children. Event-related theta (4–7 Hz), alpha (8–13 Hz) power and phase-locking were analyzed. The young adults had higher memory performance than the children for both auditory and visual paradigms. The children had increased theta phase-locking and left alpha power in response to the remembered objects in comparison to the forgotten objects. The young adults had higher theta and alpha phase-locking than the children over the frontal and central locations (p < 0.05), and the children had higher parietal-occipital alpha phase-locking than the young adults. There was an increase in alpha power in children, whereas young adults had decreased post-stimulus alpha power in response to memory paradigms. The present study showed that frontocentral theta and alpha phase-locking had an essential role in brain maturation and successful memory performance. Event-related theta and alpha responses could be one of the important indicators of the mature and healthy brain, and these responses could change depending on the maturation state and age.