运动员不同状态下的脑电图特点(综述)     

秦素荣 《体育学刊》2002,9(1):42-44

综述了我国体育领域对运动员脑电图的研究成果，重点阐明运动员安静时、负荷后、疲劳后、过度训练以及脑外伤的脑电图特点，以期为运动员选材、训练、医务监督等提供一些高级神经活动方面的理论依据。  相似文献   

基于移动平台的运动想象脑电分析方法研究     

王锦丽  穆振东 《科技广场》2011,(3)

BCI系统的研究,经过二十多年的发展,已经慢慢地走出实验室,面向应用。为更方便对运动功能障碍人士进行帮助,把传统BCI系统移植到移动平台上就显得尤为重要。本文利用AR模型把时域信号转换到频域,然后利用Fisher距离进行特征提取,利用定义的线性分类器进行分类。结果表明,利用本方法能很好地识别三种不同运动想象类型。  相似文献   

高频重复经颅磁刺激(rTMS)提高运动员的兴奋性及其脑电特征研究     

罗光霞  刘运洲 《天津体育学院学报》2011,26(5):449-452

目的:探讨高频重复经颅磁刺激(rTMS)的兴奋作用及其脑电活动,为使用rTMS提高运动员的唤醒水平提供理论基础。方法:采用2×2×2混合设计,在运动员左侧背外侧前额叶(DLPFC)施加20 Hz,90%RMT,3 000次rTMS(持续5 s,间隔55 s),分别测试刺激前、后的自评兴奋度和脑电(EEG)。结果r:TMS刺激后男、女被试的自评兴奋性提高,额部α波、β波和央部β波的活动增强,顶部θ波和枕部δ波、θ波的活动减弱。结论:高频rTMS能够提高兴奋性r,TMS刺激后脑电活动的变化在一定程度上可以解释其神经生物学效应。  相似文献   

基于Android平台的脑电反馈训练系统设计     

邓冬  李华云 《科教文汇》2014,(4):106-106,111

脑电生物反馈是指运用工程技术的方法将正常人无法知道的脑电信息检测出来,再以某种形式反馈给受试者,使其学习如何增加或者保持某种脑电成分。脑电生物反馈是治疗儿童注意力缺陷与多动障碍的有效方法。本文给出了基于Android系统的脑电反馈训练系统的设计。该系统选用成熟的脑电采集模块采集脑电数据,通过蓝牙将数据传递给Android移动终端,并在Android系统上开发反馈训练程序,实现了脑电生物反馈。  相似文献   

Readying the head and steadying the heart: a review of cortical and cardiac studies of preparation for action in sport     

《International review of sport and exercise psychology》2013,6(1):122-138

Expert sport stars reliably execute their skills with remarkable precision and accuracy. To provide an insight into the mechanisms that underpin the superior performance of experts compared to novices, this article critically reviews experiments that have examined cortical activity (i.e., movement related cortical potentials; EEG spectral power) and cardiac activity (i.e., dynamic changes in heart rate) during preparation for action in self-paced aiming sports. It suggests that decelerations in heart rate and task-specific changes in EEG activity during preparation for action can explain superior expert performance. These psychophysiological responses are interpreted in terms of preparatory information processing and response programming, before suggestions for future research into the psychophysiology of preparation for action are outlined.  相似文献   

脑机接口研究概述     

肖首柏  胡剑锋 《科技广场》2007,(9):229-232

脑机接口(BCI)是在人脑和外界之间建立不依赖于常规大脑信息输出通路(外周神经和肌肉组织)的一种通讯系统,概述了基于EEG的BCI技术的基本原理、研究方法、类型和研究现状,并分析了存在的问题与应用前景。  相似文献   

教学视频中教师出镜对教师的作用--基于对比实验和访谈的实证分析     

杨九民  艾思佳  皮忠玲  喻邱晨 《现代教育技术》2021,(1):54-61

为探究教学视频录制过程中教师出镜对教师的作用,文章以60名准教师为研究对象进行对比实验,设计了出镜与不出镜两种教学视频录制模式,并记录其脑电信号,探究其专注程度、放松程度、应激水平和教学效果的差异。研究发现:尽管相较于不出镜教师,出镜教师更紧张,但其教学效果却更好。此外,文章还访谈了10名一线教师对教学视频录制过程中教师出镜的态度和看法,发现:出镜授课对教师教学心理和教学效果具有一定的影响。文章的研究结果为教学视频的设计与开发提供了相应的证据支持和理论支撑,教师可以运用出镜授课的方式提高教学效果,未来此方式也可拓展至在线教学和教师专业发展领域。  相似文献   

Model of Current Threshold for Perception in Testing Electrical Safety Performance*     

王晓飞  张朝晖  李东  刘国忠  赵旭 《天津大学学报(英文版)》2010,16(1):11-16

A generalized mathematical model of human body current threshold for perception was established and the current flowing through human body could be arbitrary cyclical waveforms.The relationship between human body current threshold for perception and current frequency, true root mean square(RMS) value and influence factor was described.A test system was established based on electroencephalogram(EEG) to study the relationship between human body current threshold for perception and current waveform, frequency ...  相似文献   

癫痫脑电信号的非线性分析方法     

黄小娜  张军英 《河西学院学报》2010,26(2):29-32

癫痫是大脑神经元过度放电而导致的一种大脑功能障碍性疾病,癫痫发作对大脑的损害是不可逆的.目前,针对癫痫常用的几种非线性动力学分析方法包括相关维数,Lyapunov指数,复杂度等.这些方法可有效分析癫痫患者的脑电信号,对治疗癫痫具有重要临床价值.  相似文献   

EEG dynamics reflects the partial and holistic effects in mental imagery generation     

Li J  Tang YY  Zhou L  Yu QB  Li S  Sui DN 《Journal of Zhejiang University. Science. B》2010,11(12):944-951

Mental imagery generation is essential in the retrieval and storage of knowledge. Previous studies have indicated that the holistic properties of mental imagery generation can be evaluated more easily than the partial properties. However, the relationship between partial and holistic mental imagery generations has not been clearly demonstrated. To address this issue, we designed a task to investigate the changes in the spectrum of the electroencephalogram (EEG) during partial or holistic imagery generation. EEG signals were obtained from 18 healthy subjects, and a statistical measure of spectral dynamics between two EEG signals in per frequency band was performed. Additionally, a bicoherence spectrum analysis was used to detect the phase coupling within these two imagery conditions. Our results indicated that EEG of the partial imagery appeared earlier and stronger than that of the holistic imagery in the theta (5–8 Hz) range in a time window around 220 to 300 ms after cue onset, and a slight decrease in the alpha (8–12 Hz) band was observed at around 270 ms. The scalp topography of these changes in the theta and alpha bands distributed overall significantly in the frontal and central-temporal areas. The significant phase coupling within two conditions was remarkable at high frequency. From these results, we infer that there are complex relations between partial and holistic imageries. The generation of partial mental imagery is not a subprocess of holistic imagery, but it is relevant to holistic imagery and requires correct modification from the holistic information.  相似文献