孤束核对胃机能调控的研究进展     

孙洪兆 《山东教育学院学报》2012,27(5)

神经解剖学和生理学的研究证明,孤束核（nucleusofsolitarytract,NrIS）是调控胃机能的重要副交感初级中枢。本研究就NTS的细胞构筑和突触联系、NTS对胃的神经支配、电刺激NTS对胃机能的影响以及NTS内的神经递质和受体对胃机能的调控进行了综述。  相似文献   

对自由式滑雪空中技巧运动员神经类型特征的调查与分析   总被引：5，自引：0，他引：5  

杨海平  郭云清 《中国体育科技》2000,36(3)

本文使用 80 .8神经类型量表对我国自由式滑雪空中技巧运动员男、女 1 5人进行了测试 ,结果表明 :其具有明显的项目特征 ,且不同水平、不同性别的运动员神经类型比较无差异。本文认为 ,在选拔自由式滑雪空中技巧运动员时应重视其神经类型 ,在安排训练时 ,应根据运动员的神经类型特点 ,采用不同的训练方法  相似文献   

优秀田径运动员心率变异性分析   总被引：4，自引：0，他引：4  

黄晖明  朱晓梅  刘凌 《体育与科学》2008,29(6)

目的:分析优秀田径运动员心率变异性(HRV)特征,为HRV在运动员选材、机能评定等应用提供理论依据。方法:选取江苏省专业运动队优秀田径运动员和普通健康人各25名进行连续5min心电图时域和频域记录获得HRV指标,以普通健康人为对照分析优秀田径运动员HRV特征。结果:(1)女运动员VLF低于男运动员(P<0.05),其余指标无性别差异。(2)优秀田径运动员SDNN、RMSSD、PNN50、TP、HF、VLF均高于普通健康人(P<0.05或P<0.01);LF、LF/HF二者无差异(P>0.05)。结论:(1)优秀田径运动员自主神经活性和迷走神经的紧张性没有性别差异,安静时男性运动员拥有较高的交感神经张力。(2)优秀田径运动员安静时比普通健康人拥有更强的心脏自主神经活性、更高的迷走神经紧张性和交感神经兴奋性,迷走和交感神经均衡性无差异。  相似文献   

Monitoring weekly heart rate variability in futsal players during the preseason: the importance of maintaining high vagal activity     

Fabio Y. Nakamura  Lucas A. Pereira  Felipe N. Rabelo  Andrew A. Flatt  Michael R. Esco  Maurizio Bertollo 《Journal of sports sciences》2016,34(24):2262-2268

ABSTRACT

This study aimed to compare the weekly natural log of the root-mean-square difference of successive normal inter-beat (RR) intervals (ln RMSSD_Weekly) and its coefficient of variation (ln RMSSD_CV) in response to 5 weeks of preseason training in professional male futsal players. A secondary aim was to assess the relationship between ln RMSSD_Weekly and ln RMSSD_CV. The ln RMSSD is a measure of cardiac–vagal activity, and ln RMSSD_CV represents the perturbations of cardiac autonomic homeostasis, which may be useful for assessing how athletes are coping with training. Ten futsal players had their resting ln RMSSD recorded prior to the first daily training session on four out of approximately five regular training days · week^?1. Session rating of perceived exertion (sRPE) was quantified for all training sessions. Despite weekly sRPE varying between 3455 ± 300 and 5243 ± 463 arbitrary units (a.u.), the group changes in ln RMSSD_Weekly were rated as unclear (using magnitude-based inference), although large inter-individual variability in ln RMSSD responses was observed. The ln RMSSD_CV in weeks 4 and 5 were likely lower than the previous weeks. A large and significant negative correlation (r = ?0.53; CI 90%: ?0.36; ?0.67) was found between ln RMSSD and ln RMSSD_CV. Therefore, monitoring individual ln RMSSD responses is suggested since large inter-individual variations may exist in response to futsal training. In addition, higher values of ln RMSSD are associated with lower oscillations of cardiac autonomic activity.  相似文献   

The effects of forearm fatigue on baseball fastball pitching,with implications about elbow injury     

Lin-Hwa Wang  Kuo-Cheng Lo  I-Ming Jou  Li-Chieh Kuo  Ta-Wei Tai  Fong-Chin Su 《Journal of sports sciences》2016,34(12):1182-1189

This study investigated the contribution of flexor muscles to the forearm through fatigue; therefore, the differences in forearm mechanisms on the pitching motion in fastball were analysed. Fifteen baseball pitchers were included in this study. Ultrasonographical examination of participants’ ulnar nerve in the cubital tunnel with the elbow extended and at 45°, 90° and 120° of flexion was carried. A three-dimensional motion analysis system with 14 reflective markers attached on participants was used for motion data collection. The electromyography system was applied over the flexor carpi ulnaris, flexor carpi radialis and extensor carpi radialis muscles of the dominant arm. Flexor carpi ulnaris muscle activity showed a significant difference during the acceleration phase, with a peak value during fastball post-fatigue (P = 0.02). Significant differences in the distance between ulnar nerve and medial condyle on throwing arm and non-throwing arm were observed as the distance increased with the elbow movement from 0° to 120° of flexion (P = 0.01). The significant increase of the flexor carpi ulnaris muscle activity might be responsible for maintaining the stability of the wrist joint. The increased diameter might compress the ulnar nerve and cause several pathological changes. Therefore, fatigue in baseball pitchers still poses a threat to the ulnar nerve because the flexor carpi ulnaris and flexor carpi radialis all originate from the medial side of the elbow, and the swelling tendons after fatigue might be a key point.  相似文献   

浅谈学生自主网络英语学习能力的培养     

肖鹏  伍涛 《沙洋师范高等专科学校学报》2006,7(4):77-79

网络和多媒体技术在教育领域的应用引起了教育观念，教育模式，教学方法和教学手段的变革。在这种大的发展背景下，引发了外语教学与研究领域对网络化教学过程中。学生自主学习外语能力培养问题的关注。本文试通过对网络化学习和自主学习各自特点和优势以及相互关系的分析来强调信息技术与英语教学整合对培养学生自主学习和终身发展能力的重要意义。  相似文献   

大学英语听说课堂自主学习初探   总被引：1，自引：0，他引：1  

李学瑜 《湖北广播电视大学学报》2008,28(11):125-125

本文主要通过对于大学英语听说课堂的自主学习研究,来探求促进大学生进行听说自主学习的教学策略。  相似文献   

不同年龄射击运动员的运动水平与神经系统特性及其气质类型的关系   总被引：3，自引：0，他引：3  

李琳 《体育科学》2007,27(3):83-93

采用标准化的BTL-QZ—V1．1气质测试系统对国内107名手枪慢射和步枪运动员进行了神经系统特性和气质类型的测查，结果表明：1）不同运动水平手枪慢射运动员在神经系统灵活性上差异显著，主要表现在国际健将与其他等级运动员之间，随运动水平的升高，神经系统灵活性降低；2）不同运动水平步枪运动员在神经系统抑制性和活动灵活性上差异非常显著，运动水平越高神经系统抑制性越弱，活动灵活性越低；3）神经系统的抑制性和活动灵活性与步枪射击技术中的据枪稳定性、击发稳定性相关非常显著，相关系数在0．6～0．8之间；4）神经系统抑制性和活动灵活性对大年龄（大于等于18岁）步枪运动员运动水平的预测力强。  相似文献   

机械创新设计实验室开放式管理的思考与实践     

宋岩  张继平  张立新 《中国现代教育装备》2011,(1):97-99

机械创新设计实验室的开放式管理具有一定的难度。采用传统的管理方式,工作量大,效率不高。我们采用实验室预约系统让学员自主预约实验设备,利用实验室管理系统让学员自主管理实验室,利用合理手段让学员自主培训,自定实验项目,并取得了良好的效果。  相似文献   

网络环境下高职英语自主学习教学现状调查与研究——基于交互式大学英语自主学习课程的实施     

程颖 《重庆职业技术学院学报》2011,20(1):95-98

交互式大学英语自主学习课程是为了培养学生自主学习能力而新开设的。笔者从该课程的教学环境情况、学生学习情况和教师教学情况三方面入手进行研究,试图找出问题并找到解决问题的途径,以取得优化、高效的教学效果。  相似文献