Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14365/2508
Title: Novelty N2-P3a Complex and Theta Oscillations Reflect Improving Neural Coordination Within Frontal Brain Networks During Adolescence
Authors: Wienke, Annika Susann
Başar Eroğlu, Canan
Schmiedt-Fehr, Christina
Mathes, Birgit
Keywords: maturation
adolescence
novelty
cognitive control
N2
P3a
theta oscillations
frontal brain network
Event-Related Potentials
Working-Memory Tasks
Life-Span
Developmental-Changes
Mismatch Negativity
Voluntary Attention
Functional Networks
Response-Inhibition
Prefrontal Cortex
Evoked-Potentials
Publisher: Frontiers Media Sa
Abstract: Adolescents are easily distracted by novel items than adults. Maturation of the frontal cortex and its integration into widely distributed brain networks may result in diminishing distractibility with the transition into young adulthood. The aim of this study was to investigate maturational changes of brain activity during novelty processing. We hypothesized that during adolescence, timing and task-relevant modulation of frontal cortex network activity elicited by novelty processing improves, concurrently with increasing cognitive control abilities. A visual novelty oddball task was utilized in combination with EEG measurements to investigate brain maturation between 8-28 years of age (n = 84). Developmental changes of the frontal N2-P3a complex and concurrent theta oscillations (4-7 Hz) elicited by rare and unexpected novel stimuli were analyzed using regression models. N2 amplitude decreased, P3a amplitude increased, and latency of both components decreased with age. Pre-stimulus amplitude of theta oscillations decreased, while inter-trial consistency, task-related amplitude modulation and inter-site connectivity of frontal theta oscillations increased with age. Targets, intertwined in a stimulus train with regular non-targets and novels, were detected faster with increasing age. These results indicate that neural processing of novel stimuli became faster and the neural activation pattern more precise in timing and amplitude modulation. Better inter-site connectivity further implicates that frontal brain maturation leads to global neural reorganization and better integration of frontal brain activity within widely distributed brain networks. Faster target detection indicated that these maturational changes in neural activation during novelty processing may result in diminished distractibility and increased cognitive control to pursue the task.
URI: https://doi.org/10.3389/fnbeh.2018.00218
https://hdl.handle.net/20.500.14365/2508
ISSN: 1662-5153
Appears in Collections:PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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