Brain Connectivity in Living vs. Nonliving Visual Stimuli

摘要

Our ability to distinguish different objects of different classes is a highly complex procedure taking place within brain network. Studying the process of object recognition can help us gain a better understanding of semantic knowledge in the brain, and henceforth can be put into use for clinical applications such as treatment of patients with deficits in identifying objects around them. In this article, an ERP experiment was conducted to see how brain connectivity changes due to living vs. nonliving visual stimuli. Imaginary part of coherency was calculated to assess the amount of synchronization among five pivotal cortical regions (frontal, parietal, occipital, left and right temporal) in the brain and two-way repeated-measure ANOVA was used for statistical analysis. The results indicated functional connectivity in living stimuli are higher in occipital-left temporal alpha oscillation, frontal-left temporal theta oscillations and frontal-parietal beta oscillations compared to nonliving stimuli. On the other hand, oscillations in left temporal-right temporal beta band and frontal-parietal theta band in nonliving stimuli showed more synchronizations compared to living group.