Neurophysiological markers of contextual processing: the relationship between P3b and Gamma synchrony and their modulation by arousal, performance and individual differences.

摘要: The ability to identify and respond significant events in the environment is a vital aspect of human cognition yet poorly understood as dynamic neural process. While response contextually-relevant stimulus involves number complimentary processes, including selective attention binding, it also subject modulation by factors like arousal, age sex. Adopting an integrative approach, we investigated contextual processing (as indexed P3b Gamma phase synchrony) 120 healthy subjects performing auditory oddball task while controlling for these other modulating factors. Results suggest relationship between Gamma-2 synchrony posterior regions only, with phasic anterior seemingly unrelated that regions. However, only was significantly correlated central autonomic arousal. Further, sex were associated variation individual measures, they did not strongly affect measures. We concluded that, simple processing, global local elements target stimuli are processed parallel little being shown sexes or resulting from increasing age.