The Cognitive-neural Mechanism Of Children's Inhibition Processes

Inhibition refers to the subject of "an active process of suppression, excluding the non-relevant information of task from working memory " , it is an important part of the executive functions of the frontal lobe, it is related to reasoning of others on the psychology of social cognition. The ERP studies used auditory continuous performa- nce test (CPT) and audio-visual cross-modal interference task researched the neural basis of audio response inhibition and audio-visual information inhibition, and the participants were 14 children (8 boys and 6 girls) aged from 10 to 11. From the research we found that:1,In the audio response inhibition study, the results showed that, NoGo task required subjects to carry out response inhibition, Go and NoGo tasks evoked clear LNC, the amplitude of NoGo task was more negative than the Go task. In addition, we could clearly saw N2 component in parietal-occipital brain regions, and the NoGo-N2 amplitude was significantly greater than Go-N2 amplitude negatively. The scalp topography showed that children's response inhibition mainly negative activated frontal lobe,central area and part of parietal-occipital regions. response execution mainly activated frontal lobe and central regions. N2 component may reflects conflict monitoring , LNC may reflects the process of response inhibition. 2,In the audio-visual information inhibition study, incongruent conditions required subjects to interference inhibition, and the reaction time of incongruent conditions was significantly longer than the congruent conditions. The P1 amplitude of incongruent conditions was greater than the congruent conditions, that may revealed subjects perceived the relationship of probe stimulus and interference stimulus. N2 and N3 were mainly distributed in the frontal region of negative components, the amplitude of incongruent conditions was more negative than the congruent conditions. N2 component may reflects conflict monitoring , N3 component probably reflects the inhibition of interference stimulus. The study provides a neural electrophysiology prima facie evidence for children's audio-visual interference inhibition.From the above studies we found that different types of inhibition had different specific brain mechanisms. In addition, the two studies had confirmed that the parietal-occipital brain regions played a very important role in children's inhibition processing, which also confirmed the scalp posterior brain areas involved in inhibition to compensate the immature frontal lobe in particular the prefrontal cortex.