The Application Of VEP And BAEP To Functional Appraisal Of The Athletes

Purpose:Probing into the influent laws of the sport events to the VEP , BAEP and the changes of the VEP , BAEP before and after the quantitative load exercises in addition of the characteristics of the VEP , BAEP in the soccer athletes and the basketball athletes.Methods: Adopt the neural electricity tester of NDI-200 to examine and record the VEP and BAEP when the subjects are in the rest state and after the quantitative load exercises.Measurement of VEP: Clean and degrease the positions to place the surface electrodes using the soap water and the alcohol cotton balls.ALL subjects with nude pupil seated comfortably in a dark room with bipolar electrodes on the head at the same time the subjects were instructed to gaze at the square shaped grey target in the middle of the 12 inch screen during the testing period and the monocular recordings of all cases were obtained while the other eye was closed and the myopic subjects may wear the glasses.Chessboard pattern reversal method was applied with a speed of 2Hz,the lighteness was 90cdb,the contrast was 80%,the bandpass filters were 1Hz-100Hz, the sensitivity was 10μv and 100 responses were averaged.Measurement of BAEP:Clean and degrease the positions to place the bipolar electrodes on the head using the soap water and the alcohol cotton balls.BAEPs were elicited by monaural stimulation with"click"though an earphone and the other ear was sheltered by the white noise.The click intensity was 102db,the stimulation frequency was 30Hz,the bandpass filters were 1000Hz-3000Hz,the sensitivity was 5μv and a total of 2000 sweeps were averaged.Measurement of quantitative load exercises (PWC170):Monark Ergomedic 839E ergomedic bicycle was used to test the exercise load and heart rate.①All subjects were instructed to the purpose and the attentive things of the test in order to understand the experimental process.②The subjects were worn the chest belt electrode of the heart rate.③Input the demographic characters of the subjects according to the BRUCE protocol and tell the subjects to control the velocity at 60 revolutions per min.④Begin with the experiment while the operator was observing the change of the heart rate to 170 per min.SPSS for windows version 13.0-computer program was used for statistical analysis.Results:①Comparing that of the non-physical education students,the peak latencies(PLs) and the inter peak latencies(IPLs)of every check of the students majoring in the physical education department are shorter and the amplitudes are higher except that of the little check.The P100 PLs of the little check is obviously shorter (P < 0.05) and each PLs of the middle check besides N75～P100 amplitude is obviously different(P <0.05),the N75～P100 amplitude of the big check is obviously different(P<0.05).②Each PLs is shorter immediate the quantitative load exercise and comparing that of the pre-exercise,the P100 PLs is obviously shorter (P<0.01).Each amplitude is decreased immediate postexercise and comparing that of the pre-exercise,the N75～P100 amplitude is obviously different(P<0.05),but no difference is noted in VEP values when body temperature dropped to the pre-exercise(P>0.05).③Comparing that of the controls in the rest state,each PLs of the soccer athletes and the basketball athletes is shorter and the N75 PLs of the basketball athletes is the shortest ( P < 0.05 ) .The N75～P100 IPLs of the basketball athletes is obviously longer than that of the soccer athletes(P<0.05) and the controls ( P > 0.05 ) .The N75～P100 amplitude of the soccer athletes is obviously bigger than that of the controls(P < 0.05) and the soccer athletes(P>0.05).④Comparing those of the controls, the N75 PLs and N145 PLs of the basketball athletes until body temperature dropped to the pre-exercise level are obviously shorter(P<0.05).The P100 PLs of the soccer athletes immediate postexercise is the shortest(P<0.01) and the N145 PLs immediate postexercise and until body temperature dropped to the pre-exercise level are obviously shorter(P<0.05).The N75～P100 IPLs of the basketball athletes ( P > 0.05 ) and the soccer athletes ( P < 0.05 ) immediate postexercise are the shorter than the controls.The N75～P100 amplitude of the soccer athletes immediate postexercise is obviously bigger than that of the basketball athletes ( P < 0.01 ) .The N100～P145 amplitude of the basketball athletes immediate postexercise is shortest in that of the football athletes and the controls(P<0.05).⑤Athletic sports make the BAEPⅢPLs,ⅤPLs,Ⅰ-ⅢIPLs andⅠ-ⅤIPLs obviously longer.⑥In the rest state theⅡPLs ,ⅢPLs ,ⅣPLs of the football athletes are obviously shorter than those of the controls(P<0.05)and theⅢ-ⅤIPLs is obviously longer(P<0.05).TheⅠ-Ⅲamplitude of the football athletes is obviously shortest in that of the controls and the basketball athletes(P<0.05)and theⅢ-Ⅴamplitude is shorter than that of the controls(P<0.05).TheⅠ-Ⅲamplitude of the basketball athletes is obviously shorter than that of the soccer athletes(P<0.05).⑦BAEPⅠPLs ,ⅡPLs ,ⅢPLs ,ⅣPLs of the soccer athletes and the basketball athletes immediate postexercise and until body temperature dropped to the pre-exercise level are shorter.BAEPⅠPLs of the soccer athletes is obviously shorter than that of the controls until body temperature dropped to the pre-exercise level ( P < 0.05 ) andⅡPLs immediate postexercise is obviously shorter than that of the controls(P<0.05)andⅢPLs,ⅣPLs immediate postexercise and until body temperature dropped to the pre-exercise level are shorter than that of the controls ( P <0.05).BAEPⅢPLs of the basketball athletes is obviously shorter than that of the controls until body temperature dropped to the pre-exercise level(P<0.05)andⅣPLs is obviously shorter than that of the soccer athletes until body temperature dropped to the pre-exercise level(P<0.05).BAEPⅠ-ⅢIPLs immediate postexercise and until body temperature dropped to the pre-exercise level of the soccer athletes is shorter than that of the controls(P<0.05)and immediate postexercise is shorter than that of the basketball athletes(P<0.05).BAEPⅠ-ⅢIPLs of the soccer athletes immediate postexercise and until body temperature dropped to the pre-exercise level is longer than that of the controls ( P <0.05 ) .Conclusions:①The P100 PLs of the little check of the students majoring in the physical education department is obviously shorter and each PLs of the middle check besides N75～P100 amplitude is obviously different,the N75～P100 amplitude of the big check is obviously bigger.Those show that long-time sports make VEP PLs shorter meanwhile make amplitude bigger and point out that we should adopt the middle check when we use it to assess the function of the athletes so as to distinguish the states of the athletes well.②VEP each index shows the event characters of the basketball and soccer. For example,the N75 PLs of the basketball athletes is obviously shorter and the N75～P100 amplitude of the soccer athletes is obviously bigger.After the quantitative load exercises VEP P100 PLs, N145 PLs and N75～P100IPLs of the soccer athletes are obviously shorter and P100～N145amplitude of the basketball athletes is obviously shorter.③The quantitative load exercises only make the P100 PLs and N75～P100 amplitude transient changes.④Long-time sports make BAEPⅢPLs,ⅤPLs,Ⅰ-ⅢIPLs andⅠ-ⅤIPLs obviously longer.⑤In the rest state theⅡPLs,ⅢPLs,ⅣPLs of the football athletes are obviously shorter and theⅢ-ⅤIPLs is obviously longer andⅠ-Ⅲamplitude,Ⅲ-Ⅴamplitude is obviously shorter.⑥No difference is noted in BAEP values after the quantitative load exercises.⑦Suggest to further study more sport events so as to find out the event characters of BAEP,VEP and on the basic of them we observe the influence of one event to the BAEP,VEP for long term and develop a study to the animals so as to probe into the mechanism of the sports to BAEP,VEP.