Research On The Behavioral Characteristics And Brain Mechanism Of Rhythm Sense Of Athletes With Different Special Level Based On FNIRS

In nature,the sense of rhythm exists widely.The ability to follow the rhythm to move synchronously is of great evolutionary significance to human beings.Similarly,the sense of rhythm is very important in the field of sports.In order to explore the influence of special sports and special training level on the behavioral and brain mechanism of sense of rhythm,seven canoeing athletes and seven second-class athletes in active service in Jiangxi water sports center,10 Aerobics athletes and college students in Aerobics major in Jiangxi Normal University,and 10 armed police and their alternatives in active service in the mobile detachment of Jiangxi Armed Police Corps There are 7 team members,15 ordinary undergraduate students of Jiangxi Normal University and 27 ordinary college students of Jiangxi foreign language and foreign trade college As subjects,E-Prime software was used to design a dual task rhythm sense experiment paradigm of memory task × time task.With the help of functional near-infrared equipment(fNIRS),the differences of rhythm sense and brain mechanism of athletes at different levels and special events were explored.The research adopts a three factor mixed design,namely 4(special subject: shooting,canoeing,aerobics,ordinary college students)× 2(level: high,low)× 4(Experiment:visual rhythm experiment,auditory rhythm experiment,visual joint sense rhythm experiment,auditory joint sense rhythm experiment),to design athletes of different levels and special subjects in visual rhythm,auditory rhythm and visual joint sense Behavioral and brain mechanisms of somatosensory rhythm and auditory synesthesia rhythm were studied.The results show that:(1)From the perspective of sports projects,the results of behavioral research show that the visual sense of rhythm shows that the time replication difference of each project is small,the shooting project and canoeing project are better than aerobics project,with significant difference(P < 0.05);the auditory sense of rhythm does not show the project difference,while the accuracy shows that the shooting project and canoeing project are better than aerobics project,with very significant difference The difference was p < 0.01;the rhythmic sense of visual association showed that there was no item difference between the upper difference and the lower difference,and theshooting item was superior to the aerobics item,with very significant difference,P <0.01;the kayak item was superior to the aerobics item,with significant difference,P <0.05;the left and right difference showed that the shooting item was superior to the aerobics item,with significant difference,P < 0.05.(2)From the perspective of sports level,behavioral research results show that the time replication difference of visual sense of rhythm is the level difference of shooting items,P < 0.01;there is no level difference in response time of auditory sense of rhythm,and the three items all show the level difference,P < 0.05;the up and down difference of visual sense of rhythm shows the level difference,P < 0.05;the auditory sense of rhythm The accuracy of sensation showed the difference of canoeing level(P< 0.05).(3)The results of near-infrared experiment showed that the visual rhythm task of the shooting armed police at different levels showed significant differences in the wake-up levels of ch1,CH2,CH5,CH15,ch17 and Ch18 channels,P < 0.05;the visual combination sense of rhythm task showed significant differences in the wake-up level of ch13 channels,P < 0.05.(4)The results of near-infrared experiment showed that there was significant difference in the wake-up level of ch11 channel in the task of auditory rhythm of different level shooting armed police members,P < 0.05;there was no difference in the wake-up level of channel in the task of auditory complex sense of rhythm.Conclusion:(1)Comprehensive rhythm of many components,sports training can improve the sense of rhythm,and has a special difference,shooting project is the best,canoeing project is the second,but also shows the difference in sports level,shooting project is the most obvious.(2)The results of NIR showed that the main activated brain areas of rhythm experiment task were dorsolateral prefrontal cortex and orbital prefrontal cortex,which were all concentrated on the right side,and this part of image thinking was on the right side of the brain.(3)The main reason for the difference of rhythmic brain mechanism in different levels of shooting is that the selected members activate more brain channels and wake-up level is higher.