Quantitative evaluation of the effect of visually-induced motion sickness using causal coherence function between blood pressure and heart rate
Quantitative evaluation of the effect of visually-induced motion sickness using causal coherence function between blood pressure and heart rate
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利用血压和心率之间的因果相关函数定量评估视觉引起的晕动病的影响
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
S. Nitta
中科院分区：
文献类型：
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作者：
N. Sugita;Makoto Yoshizawa;Akira Tanaka;Keishi Abe;S. Chiba;T. Yambe;S. Nitta
为探讨视觉诱发运动病对人体的影响，对51名正常人观看15 min视频图像时的血压变异性（BP）和心率变异性（HR）进行了分析。引入BP和HR之间的相干函数（K/sup 2/）和两个因果相干函数：K/sup 2//sub BP/spl random/HR/ from BP to HR和K/sup 2//sub HR/spl random/BP/ from HR to BP来划分心血管系统作为闭环系统的因果线性。K/sup 2/表示系统的总线性。K/sup 2//sub BP/spl random/HR/和K/sup 2//sub HR/spl random/BP/分别对应于压力反射系统和机械血流动力学。结果表明，易晕车者在Mayer波段（0.1Hz附近）的K/sup 2//subBP/spl ratio/HR/逐渐降低，且在后期场景中明显低于不易晕车者。从将心血管系统作为开环系统处理的常规方法中从未获得该结果。
To evaluate the effect of visually-induced motion sickness on the human, blood pressure variability (BP) and heart rate variability (HR) of 51 normal subjects watching a 15min-long video image taken by a vibrating handy camera were analyzed. Not only coherence function (K/sup 2/) between BP and HR but also two causal coherence functions: K/sup 2//sub BP/spl rarr/HR/ from BP to HR and K/sup 2//sub HR/spl rarr/BP/ from HR to BP were introduced to divide causal linearity of the cardiovascular system regarded as a closed-loop system. K/sup 2/ represents total linearity of the system. K/sup 2//sub BP/spl rarr/HR/ and K/sup 2//sub HR/spl rarr/BP/ correspond to the baroreflex system and the mechanical hemodynamics, respectively. The results revealed that K/sup 2//sub BP/spl rarr/HR/ at the Mayer wave-band (around 0.1 Hz) of the subjects prone to motion sickness decreased gradually and was significantly lower than that of the subjects not prone to in later scenes. This result has never been obtained from conventional methods dealing with a cardiovascular system as an open-loop system.
闭环心血管控制的系统识别：姿势和自主神经阻滞的影响。
DOI：
10.1152/ajpheart.1997.272.1.h448
发表时间：
1997
期刊：
The American journal of physiology.
影响因子：
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作者：
Mullen,TJ;Appel,ML;Mukkamala,R;Mathias,JM;Cohen,RJ
通讯作者：
Cohen,RJ