The Comparison On Proprioception Differences Of Different Groups And Brain Mechanism Research

Objective:To explore the proprioception differences of different groups, whether proprioception is related to shooting performance and the brain mechanism of the generation of proprioception.Methods: (1) The proprioception of university students in physical education specialty, college students majoring in Non-PE and armed police soliders were detected with the classical psychophysics test method - weight differential limen method; (2) The armed police, whose proprioception had been checked early, were surveyed three months. Their shooting scores were recorded, so that to analyzed the relationship between shooting scores and proprioception;(3) According to experiment result, two different groups were choosed by their performance in the experiment of weight differential threshold. The DL of one group is greater than 11 and another group is lesser than 6 and every group has 12 members. Using Gating paradigm and Oddball paradigm, in laboratory,which applied to the brain mechanism research, the experiment was carried out in two groups. EEG was recorded continuously with Ag/AgCl electrodes from 64 scalp electrodes relative to a vertex reference.Results: (1) college PE majors, non-professional sports college students and armed police soldiers Dlu no significant differences of college PE majors and armed police soldiers DLl and DL also have no significant difference, college PE majors and armed police soldiers DLl and DL and non-professional sports college students significant difference compared; (2) armed police soldiers with the DL value target pistol shooting scores, machine parts shooting scores significantly correlated; (3) constant stimulation paradigm, three different somatosensory load stimulation induce the brain electrical components, 120g load stimulation induce the brain electrical components and other two stimulation induce the brain electrical components; very significant difference in Somatosensory pros grouping brain electrical components in the band FPz, T7 has FP1, FT7 and FCz, T5, remarkable difference. LianDian guide In Oddball paradigm, frontal NSW and top pillow area significantly associated LPP and target stimulation; N1, N250 component units motocycle P180 and volatility and incubation period whether different stimuli or from different groups, have no obvious difference; From different groups somatosensory evoked eeg judged the difference is mainly in the frontal lobe.Conclusions: (1) proprioception exercise effect is obvious. Whether special proprioception practice or regular physical activity training can improve the body's proprioception ability. (2) proprioception and pistol shooting and machine gun position target achievement significantly related proprioception is the effect that target shooting and pistol parts of the important factors that machine gun in the two shooting sports training proprioception training should be strengthened; Proprioception different crowd, pistol shooting scores significantly different target areas; Proprioception general group the variance of the firing score than proprioception excellent group, shows that the striker proprioception excellent stability is better. (3) In gating paradigm, the proprioceptive components of the subjects with best performance, which were evoked by different proprioceptive stimulus, exerted significant difference. In gating components, the amplitude differentiae of P180 evoked by different stimulus was relatively small. While in bad performance group, the amplitude differentiae of the ERPs components evoked by different stimulus was not significant. Which mainly resulted form that the propriocetive receptors of the BEST were more sensitive with the afferent proprioceptive signals,; The regulation system of somatic motor had paid more attention to afferent signals and had more powerful choosing and more strong cognitive processing abilities. (4) The brain evoked potentials of two groups with different proprioception, which stimulated by different stimulus,exetred significant difference in gating paradigm. From ERP components, gating of N250 could be induced by every different stimulus. Furthermore, the distribution of N250 exhibited obvious difference in F7, F5 and FT7. Which indicated the proprioceptive domain located in frontallobe, bitamporal and gyrusprecentralis. (5) In Oddball paradigm, the ERP components varied significantly in different stimulus and the mainly difference manifested in N250 and late component and the difference of the distribution mainly manifested in frontallobe, bitamporal and gyrusprecentralis.(6) The negative slow wave in frontallobe, bitamporal and gyrusprecentralis and the late positive potentials distributed in parietal lobe were more sensitive to the paradigm of stimulations and the amplitudes of these waves were augmented obviously in Oddball paradigm.