A Study On Inhibition Control Ability Of College Volleyball Players In Different Positions

Objective: fNIRS was used to explore the differences of inhibition control ability in different positions of college volleyball players and to analyze the brain activation mechanism of their dominant characteristics.Methods: A questionnaire survey was conducted to select 18 persons in the setter group(average age: 20.06±1.31,average years of exercise: 6.83±1.51),17 persons in the free group(average age: 20.47±1.13,average years of exercise: 6.82±1.43),and18 persons in the main attack group(average age:19.83±1.30,average exercise years:6.72±2.27),18 people in the receiving group(average age: 19.72±1.36,average exercise years: 6.50±1.89)and 18 people in the auxiliary attack group(average age:20.28±1.49,average exercise years: 6.44±1.50)were the study subjects.Single factor design experiment was used to study the inhibition control ability of subjects.Two-way selection Oddball task and classical color word Stroop task were selected to measure the behavioral inhibition control ability and cognitive inhibition control ability of subjects,and fNIRS technique was used to monitor the changes of oxygenated hemoglobin concentration signal in the brain region of interest in the prefrontal lobe of subjects during the task.Results:(1)In the Stroop task,the behavioral results showed that there was no significant difference in the accuracy of the five groups(p>0.05),but in the response time index: the inconsistent conditioned response time of the main attack group was significantly better than that of the setter group,the free man group and the auxiliary attack group(p <0.05);The interference reaction time of main attack group was significantly better than that of setter group,free man group and auxiliary attack group(p <0.05).(2)Brain activation level: the Oxy-Hb concentration signal in the right frontal pole region(R-FPA)of the auxiliary attack group was significantly higher than that in the second transmission group(p <0.05),and the Oxy-Hb concentration signal in the left frontal pole region(L-FPA)of the main attack group was significantly higher than that in the second transmission group(p <0.05).(3)In the two-way choice Oddball task,behavioral results showed that there was no significant difference in the accuracy of the five groups(P>0.05),but in the response time index: the main attack group was significantly better than the setter group and the free man group in the standard stimulus response time(p <0.05).(4)Brain activation level:The Oxy-Hb concentration signal in the middle frontal pole region(M-FPA)of the auxiliary attack group and the main attack group was significantly higher than that in the second attack group(p <0.05),and the Oxy-Hb concentration signal in the left dorsolateral prefrontal lobe(L-DLPFC)of the main attack group was significantly higher than that in the second attack group and the free man group(p<0.05).In the left ventral prefrontal lobe(L-VLPFC),the concentration of Oxy-Hb in main attack group and receiving group was significantly higher than that in set group(p <0.05),and that in main attack group was significantly higher than that in free man group(p <0.05).Conclusion:(1)The dominant group had advantages in cognitive inhibition control ability,which was specifically manifested in faster reaction time in behavioral indicators.(2)In the cognitive inhibition control task,the primary attack group was more activated in the left frontal pole region,while the secondary attack group was more activated in the right frontal pole region.(3)The dominant group had the advantage in the ability of behavior inhibition and control,which was manifested in the faster reaction time in the behavioral index.(4)In the behavioral inhibition control task,the main attack group had higher activation degree in the left dorsolateral prefrontal lobe and left ventral prefrontal lobe,the minor attack group had higher activation degree in the middle frontal pole region,and the response group had higher activation degree in the left ventrolateral prefrontal lobe.