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目的 观察不同前庭刺激下人体心率变异性 (HRV)的变化特征。 方法 33名健康受试者在 15 0s、10°/s匀速旋转后 ,分别进行 0 6°/s2 、0 8°/s2 、1 0°/s2 和 1 2°/s2 梯形旋转刺激 ,旋转的同时完成听觉认知任务并记录心电信号。 结果 匀速旋转和角加速度作用时HRV的变化特征明显不同。相对于试验前对照 ,匀速旋转时心率和HRV没有发生变化 ,但反应时显著缩短 ,正确率升高 ;而角加速度作用时 ,相对于试验前对照和匀速旋转 ,出现心率和HRV极低频功率显著降低 ;相对于试验前对照 ,反应时和正确率没有发生变化 ,但相对于匀速旋转出现反应时延长 ,1 2°/s2 时正确率下降。 结论 匀速旋转对HRV分析所表示的心血管活动没有影响 ,但对中枢可能有激活作用 ;角加速度作用时 ,HRV极低频功率显著降低 ,表明角加速度作用时主要是中枢对心血管的调节作用发生了显著改变。
Objective To observe the changes of human heart rate variability (HRV) under different vestibular stimulation. Methods Totally 33 healthy subjects were subjected to trapezoidal rotation of 0 6 ° / s 2, 0 8 ° / s 2, 1 0 ° / s 2 and 1 2 ° / s 2 at 15 0s and 10 ° / s, respectively. At the same time to complete the auditory cognitive tasks and record ECG signals. Results The characteristics of HRV changes obviously with constant rotation and angular acceleration. With respect to before the test control, heart rate and HRV changes did not occur when the constant speed rotation, but the reaction is significantly shortened, the correct rate rises; while angular acceleration action, relative to the control and uniform rotation before the test, occurrence of heart rate and HRV extremely low frequency power significantly Compared with the control before the test, the reaction time and the correct rate did not change, but the reaction time was longer than that of the constant speed rotation, and the accuracy dropped at 12 ° / s2. Conclusion uniform rotation has no effect on HRV analysis indicated cardiovascular activity, but may have a central role in activation; when the angular acceleration effect, extremely low frequency HRV power decreased significantly, suggesting that the role of the angular acceleration is mainly the central regulation of cardiovascular occurred Significantly changed.