不同运动及特殊环境下运动对脑血流影响的研究述评  

Effect of different exercises and exercis under special environment on cerebral blood flow

作　　者：郭红[1] 

机构地区：[1]华南师范大学体育科学学院,广东广州510631

出　　处：《体育学刊》2006年第4期57-60,共4页Journal of Physical Education

摘　　要：综述了有关不同强度和形式的运动,以及特殊环境下运动对脑血流和脑自动调节影响的研究。结果说明中小强度的运动可引起脑血流速度的升高,而高强度运动则使其降低。与动力性运动不同,静力性运动不改变脑血流速度。运动中血流的改变与交感激活引起的血管舒缩和二氧化碳改变有关。通常脑血流自动调节能力不因运动而改变,但力竭运动可使之减弱。热环境下运动时脑血流速度加快以增加散热,但高热下运动时脑血流速度会因过度通气而下降,从而使脑内热积聚,导致疲劳。低氧环境下运动时脑血流速度明显加快以保证大脑足够的氧供,但急性低氧暴露可抑制运动对脑血流的增加效应。This review summarized the effect on cerebral blood flow （CBF） and cerebral autoregulstion （CA） of different kind of exercises with different intensity or under special environment. CBF is increased during moderate exercise but decreased in heavy exercise, as well as augmented in dynamic exercise yet maintained in static exercise.The change of CBF is due to the sympathetic activation and carbon dioxide change during exercise. Also, CA is not changed with the exercise, but might be impaired by exhaustive ones. CBF is enhanced for the beat remove during exercise in beat, yet reduced with hyperthermia because of the hyperventilation. And exercise under hypoxic exposure causes the more rapid CBF to provide adequate oxygen to brain, though acute hypoxic exposure inhibits this reaction.

关 键 词：脑血流速度 脑自动调节 运动强度 热环境 低氧暴露 

分 类 号：G804.2[文化科学—运动人体科学]