长时间认知操作任务对脑功能状态的影响

发布时间：2018-04-11 05:09

本文选题：认知操作 + 脑功能　；参考：《宁波大学》2017年硕士论文

【摘要】：研究目的:在竞技运动中,运动心理疲劳会导致运动员在训练和比赛中出现不良表现,甚至产生严重的心理健康问题。基于脑波超慢涨落技术通过实验探索长时间认知加工任务诱发中枢疲劳的神经递质机制。研究方法:以Flanker任务参与为自变量,S谱系、行为学数据、心率变异数据为因变量。对38名宁波大学体育学院本科学生前测后测研究,通过行为学数据、心率变异指标来检测认知任务参与是否能诱导出中枢疲劳及S谱系的变化。研究结果:(1)不同时段的正确率和反应时均呈下降趋势且存在显著性差异(p0.01,p0.05);(2)实验前后心率变异的总体标准差和反映快变化成分的显著升高(p0.01,p0.01);(3)高频段功率值显著下降(p0.05),低频段功率值、低频段与高频段功率值比较不存在显著差异(p0.05);(4)代表5-羟色胺的S4系显著上升(p0.01),其他抑制性神经递质不存在显著性差异(p0.05);(5)代表强兴奋递质的S6系显著下降(p0.01),其他兴奋性神经递质不存在显著性差异(p0.05)。研究结论:1、长时间认知操作任务会引起正确率降低、反应时缩短和HRV的迷走成分降低;2、长时间认知操作任务引发S4显著升高,提示S4是评价认知性中枢疲劳的敏感指标;3、长时间认知操作任务没能引起其他抑制性递质的增加和兴奋性递质的降低。
[Abstract]:Objective: in competitive sports, sports mental fatigue will lead to poor performance of athletes in training and competition, and even serious mental health problems.In this paper, the neurotransmitter mechanism of central fatigue induced by long time cognitive processing tasks is explored through experiments based on the brain wave ultralow fluctuation technique.Methods: using Flanker task participation as independent variable, behavioral data and heart rate variability data as dependent variables.A pre-test and post-test study was conducted in 38 undergraduate students of physical education college of Ningbo University. The behavioral data and heart rate variability index were used to detect whether cognitive task participation could induce central fatigue and S-pedigree changes.Results: (1) the accuracy and reaction time of different time periods showed a decreasing trend and there were significant differences (p0.01) the total standard deviation of heart rate variability (HRV) before and after the experiment and the significant increase reflecting the fast-changing components (P0.01 + p0.01P0.01TY3) the power value of high frequency band decreased significantly (P < 0.01 or P < 0.05 or P < 0.01, P > 0.05, respectively.) the total standard deviation of heart rate variability (HRV) was significantly increased before and after the experiment.P0. 05, low frequency power,There is no significant difference between the power values of low frequency band and high frequency band. (p0.05P0. 05) the S4 strain representing serotonin has a significant rise (p0. 01), while other inhibitory neurotransmitters have no significant difference (p 0. 05%). The S6 strain with strong excitatory transmitters has a significant decrease in p0. 01, while the other S6 strains with strong excitatory transmitters have a significant decrease in p0. 01, while there is no significant difference in other inhibitory neurotransmitters (p 0. 05).There was no significant difference in perphentive neurotransmitters (p 0.05).The conclusion of the study is that: 1, long time cognitive task can cause the decrease of correct rate, the shortening of reaction time and the decrease of the vagus component of HRV by 2%, and the long time cognitive task can cause the increase of S4 significantly.It is suggested that S4 is a sensitive index for evaluating cognitive central fatigue, and long term cognitive task can not induce the increase of other inhibitory transmitters and the decrease of excitatory transmitters.
【学位授予单位】：宁波大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：G804.8

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