运动疲劳对大脑随意运动控制的影响  

Influence of Exercise-induced Fatigue on Brain Activity during Voluntary Movement

作　　者：侯莉娟[1] 宋争[2] 于勇[1] 朱凌泽[1] 王君[2] 

机构地区：[1]北京师范大学体育与运动学院,北京100875 [2]北京师范大学认知神经科学与学习国家重点实验室,北京100875

出　　处：《北京体育大学学报》2012年第3期71-74,79,共5页Journal of Beijing Sport University

基　　金：国家自然科学基金(No:30800267);教育部留学回国人员科研启动基金资助项目;中央高校基本科研业务费专项资金资助

摘　　要：目的:观察运动疲劳前后,随意运动执行阶段脑区激活情况,探讨运动疲劳中枢调控的机制。方法:采用全脑功能磁共振成像(fMRI)技术,在7名健康男性大学生一次性功率自行车力竭运动前后,进行手握拳运动阶段大脑功能活动的扫描。数据经过头动校正、空间标准化、高斯平滑等预处理后,通过相关分析获得随意运动阶段脑激活图,采用SPM软件对参与随意运动的脑区进行解剖定位,并对运动疲劳前后参与调控的脑区进行配对样本t检验组间分析,寻找激活程度发生变化的脑区。结果:运动疲劳前后非利手执行握拳随意运动时大脑激活位点分别包括对侧初级感觉运动区、双侧运动前区、辅助运动区、小脑、丘脑、岛叶、纹状体及苍白球等,激活位点没有显著差别。但运动疲劳前激活程度显著高于运动疲劳后的脑区包括同侧基底神经节的丘脑和纹状体。利手执行握拳随意运动时大脑激活位点及激活量没有显著差异。结论:运动疲劳对参与随意运动控制的脑区位点没有显著的影响,但是同侧基底神经节的纹状体和丘脑参与调控的激活程度发生显著变化。Objective： Investigating the brain activity during hand voluntary movements before and after exercise-induced fatigue,and discussing the related central mechanism.Method： Seven healthy male volunteers recruited from university were scanned before and after exhaustive bicycling exercise while performing the visually instructive movement tasks with their right and left hands.Image datasets were spatially normalized according to the standard coordinate,and spatially smoothed with isotopic Guassian Kernel.Statistical parametric maps（activation maps） for left hand and difference active brain areas were found respectively by cross-correlation analysis.Result： Non-dominant hand movement before and after fatigue exercise mainly activated contra-lateral primary sensorimotor cortex（M1）,bilateral premotor,supplementary motor area（SMA） and cerebellum,thalamus,putaman,caudate,pallidum and insula.There is no difference about the activation map before and after fatigue exercise.While the activation level of thalamus and striatum before fatigue exercise is higher than after fatigue exercise significantly.Conclusion： There is no significant difference on the activation map before and after fatigue exercise while the activation level regulated by the corpus striatum and thalamus of basal ganglion is significantly changed.

关 键 词：随意运动 磁共振成像 运动疲劳 脑区激活 

分 类 号：G804.2[文化科学—运动人体科学] R87[文化科学—体育学]