Effect Of Dorsolateral Prefrontal Cortex Activity Level On The Perception Prediction Process Of Boxers

This study based on the information processing model of sports perception prediction and the application of repetitive transcranial magnetic stimulation technology in regulating the activity level of cerebral cortex.This experiment used game video to simulate sports situation and ERP recording technology to reveal the influence of the activity level of dorsolateral prefrontal cortex of boxers on the cognitive processing course of perception prediction and the brain neural mechanism.It provides theoretical support and practice guidance on the sports perception prediction training of boxer and scientific training.This study consists of three experiments:The first experiment adopted search task,which is divided into two tasks:search task without refresh and search task with refresh.20 high-level boxers were randomly assigned to receive magnetic stimulation(10 boxers)and pseudo stimulation(10 boxers).The results showed that the response time and accuracy of the magnetic stimulation group were higher than the pseudo stimulation group,and the difference was significant in the search task with refresh.There was a significant difference between the two groups in the early ERP components induced by the task,and an obvious N2 component was induced in the search task with refresh.The improvement of dorsolateral prefrontal activity level can significantly promote the early target selection,improve the control ability of attention resources,attention range and target orientation in the process of information processing,and improve the inhibition ability of the completed target stimulation.The second experiment adopted the spatial position n-back task,which is divided into1-back and 2-back.The participants are the same as experiment one.The results showed that there were significant differences in response time and accuracy.Furthermore,the magnetic stimulation group was better than the pseudo stimulation group.The amplitude and latency of N2 and P3 were also significantly different between the two groups.The latency of the magnetic stimulation group was smaller than that of the pseudo stimulation group.The improvement of the activity level of dorsolateral prefrontal lobe can enhance the depth of information processing.Through the deep processing of information recognition,it can reduce the resource consumptionwhen extracting and memorizing the original information for integration.The thrid experiment adopted prediction task which used the game video to simulate real sports situation.The participants are the same as the first experiment.The results showed that the magnetic stimulation group was superior to the pseudo-stimulation group in response time and accuracy.The amplitude of N1 in the magnetic stimulation group was larger than that in the pseudo stimulation group;there was no group difference in the amplitude and latency of P2;the amplitude of N2 in the magnetic stimulation group was larger than that in the pseudo stimulation group,and the amplitude of P3 in the magnetic stimulation group was smaller than that in the pseudo stimulation group.The enhancement of dorsolateral prefrontal activity promotes the brain's ability to direct the target stimulus,and speeds up the matching of information captured by the visual system and the existing memory representation.Conclusion: The enhancement of the level of dorsal and external prefrontal cortex activity can significantly promote the selective attention of athletes,and has a more significant effect on the visual search with refresh function.Back outside of prefrontal activity level enhancement can significantly promote the working memory ability;In the process of perceptual prediction,the promotion effect of motor performance lies in the improvement of the speed of target search,the inhibition of irrelevant information and the efficiency of memory extraction in the selective attention stage and the working memory stage,and the shortening of the activation time course of neural activity.