Responses to eccentric rotation in two space-bound subjects

Summary Two subjects were rotated eccentrically in the manner described previously. In contrast to a normal control group, settings of a luminous line to the subjective vertical were almost unrelated to the gravitoinertial vector before, and totally so shortly after, space flight. Only 3 days postflight did a clear relation to the gravitoinertial vector re-establish itself in the one subject who actually flew. The correspondence became normal 5 days after the flight. Since there were no clinical abnormalities evident in the subjects, it is suggested that both subjects suppressed their vestibular information, presumably as an effect of vestibular deconditioning training before the flight. In addition, as a consequence of the flight experience one subject continued to ignore it several days after the flight.Abbreviations DARA Deutsche Agentur für Raumfahrtangelegenheiten - DLR Deutsche Forschungsanstalt für Luft-und Raumfahrt - ESA European space agency - ESTEC European space research and technology centre - G _z G-Units (9.81 m/s²) in z-axis direction - L-xx Launch minus xx days - R+xx Return - VESTA ESA Neurovestibular experiment facility     

评价三维滚轮评定前庭功能的应用价值

目的探讨电动三维滚轮在评定前庭功能稳定性中的作用。方法 20名被试者分别接受转椅90 s和三维滚轮5 min的测试,而后依据症状和主诉对其前庭反应进行评级并对比两者通过率。结果被试者分别应用转椅90 s和三维滚轮5 min检测,二者前庭反应评级高度一致。结论电动三维滚轮可以用于前庭功能稳定性的评定。     

老年人下肢肌力简易测试方法

目的 筛选安全简易的方法对老年人下肢肌力进行测评,旨在更全面地评价老年人体质状况,并有利于引导老年人进行合理的下肢肌力练习.方法 对64名老年人进行30 s连续坐椅测试,同时进行Cybex等动肌力测试以及利用Inbody身体成分仪测试肌肉含量,进行相关性分析和信度效度检验;在此基础上,对249名老年人进行30 s连续坐椅测试,初步建立老年人评价参考值.结果 30 s连续坐椅次数与膝关节60°/s、180°/s屈、伸峰力矩、平均功、总功均呈显著性相关,与60°/s的相关性系数为0.479～0.850;与180°/s的相关性系数为0.602～0.905;30 s连续坐椅次数与下肢肌肉含量的相关系数为男0.724,女0.751;60～69岁老年人30 s连续坐椅次数为男(16.5±4.7)次,女(15.3±4.0)次.结论 30 s连续坐椅次数与下肢肌肉力量、耐力呈线性相关关系,其测试方法安全简便,能较好地评价老年人下肢肌肉力量,该研究建立的评价参考值可用于老年人下肢肌肉力量评价.     

2013 年深圳市福田区中小学生使用升降式课桌椅监测结果

目的了解深圳市福田区中小学课桌椅使用的卫生学状况。方法根据《学校课桌椅功能尺寸》（GB／T3976—20吃）标准对38所中小学2280套课桌椅进行监测。并对356名中小学生进行人体测量。结果2013年深圳市福田区中小学课桌配置符合率为29．96％,课椅配置符合率为37．32％,桌下净空高符合率为1．32％。结论深圳市福田区课桌椅配置符合率偏低,学校应及时调整不合理配置,以确保学生健康。     

Yoga Exercise Intervention Improves Balance Control and Prevents Falls in Seniors Aged 65+

IntroductionBody balance control represents a key factor preventing falls and subsequent injuries in seniors aged 65+. Intervention based on yoga exercises seem to be effective in improving balance.ObjectiveThe objective is to analyse and compare changes in static, dynamic, and total balance scores, changes in body composition and social indices as effects of yoga-based intervention.MethodsA total of 500 participants (234 men aged 74.5 SD±7.74 and 266 women aged 76.9 SD±7.23) were assessed using the Tinetti Balance Assessment Tool, the InBody 230 bioimpedance body composition analyser, and the SF-36 Health Survey, applied to pre and post-testing. The experimental group (n=262; 122 males; 140 females) underwent a four-week yoga-based intervention, 30 minutes daily, while the control group (n=238; 112 males; 126 females) underwent its usual daily programme at senior homes or centres. The ANOVA model, consisting of the Group, Stage, Subject and Group × Stage interaction factors, was used for data evaluation.ResultsIntervention led to improvements in the static, dynamic and total balance scores in the experimental group compared to the control group. The results of SF-36 showed positive changes in the psychosocial aspects of health, such as promoting of calmness and happiness in male seniors and reducing fatigue, nervousness and depression in female seniors. The post-intervention decrease in body fat percentage and increase in muscle mass in seniors is discussed.ConclusionsThe four-week yoga-based intervention had positive effects on the static, dynamic and total balance scores, body composition and social status.     

沙滩椅体位及控制性降压下肩关节手术病人脑氧饱和度与脑部血流速度改变及其对术后神经认知的影响

目的 分析沙滩椅体位及控制性降压下肩关节手术中脑氧饱和度(r Sc O2)与脑部血流速度的变化,及其对病人术后神经认知的影响。方法 选取拟于本院以沙滩椅体位接受肩关节手术治疗的病人60例,均为美国麻醉医师协会(ASA)分级Ⅰ、Ⅱ级,在静脉全身麻醉及控制性降压干预下,于麻醉前、麻醉并转入沙滩椅体位后5 min、手术开始时以及手术开始后每隔20 min直至手术结束进行rScO₂、大脑中动脉血流速度(VMCA)和有创血压(心脏水平和耳道水平)的检测,并记录脑氧欠饱和事件(CDE)的发生。同时,于术前和术后24 h对病人进行神经认知能力测试。结果 转入沙滩椅体位后所有病人的rScO₂和VMCA相比麻醉前都有所下降。经历CDE的病人耳道水平平均动脉压、rScO₂和VMCA均显著低于未经历CDE的病人,并且术后24 h时连线测试成绩也更低,组间差异有统计学意义(P<0.05)。结论 对于ASA分级Ⅰ、Ⅱ级病人,沙滩椅体位及控制性降压下肩关节手术中部分病人的rScO₂和VMCA较麻醉前显著下降并发生CDE,...     

多功能颈椎牵引椅的研制

为了提高颈椎病治疗效果,我们设计了一种带有角度控制的多功能颈椎牵引椅。多功能颈椎牵引椅基于生物力学原理设计,选用ATMEGA16作为核心处理器,实时监测和处理各通道传感器采集到的牵引力、牵引角度等信号,通过对机械系统的精确控制,实现力量、角度的组合牵引。实验结果表明,系统精度高、运行平稳可靠,可以有效缓解颈椎病症状,具有广阔的应用前景。