Russell P, Weld A, Pearcy M J, Hogg R, Unsworth A
Centre for Biomedical Engineering, University of Durham.
Br J Rheumatol. 1992 May;31(5):329-32. doi: 10.1093/rheumatology/31.5.329.
An electronic device for the measurement of three-dimensional movements, the Polhemus Navigation Sciences 3Space Isotrak system, was used to measure the range of movement in the lumbar spine of: (1) 10 young adults pre- and post-normal night-time sleep; (2) 10 young adults tested every 2 h over a 24-h period. The results obtained for the 10 subjects tested pre-/post-sleep showed there to be significant decreases in flexion, extension and lateral bend post-sleep. Axial rotation was not seen to alter significantly. The results obtained for the 10 subjects tested over a 24-h period showed movement during the day to be significantly more than at night. A decrease in the range of all movements except extension was observed when testing subjects in the early hours of the morning (after they had been supine for a minimum of 4 h) relative to the range observed from mid-afternoon to early evening.
一种用于测量三维运动的电子设备——波尔海默斯导航科学公司的3Space Isotrak系统，被用于测量以下两组人群腰椎的活动范围：（1）10名年轻成年人在正常夜间睡眠前后；（2）10名年轻成年人在24小时内每2小时进行一次测试。对10名受试者在睡眠前后进行测试所得到的结果显示，睡眠后前屈、后伸和侧屈均有显著下降。轴向旋转未见明显改变。对10名受试者在24小时内进行测试所得到的结果显示，白天的活动明显多于夜间。与下午中段至傍晚观察到的活动范围相比，在清晨（受试者至少仰卧4小时后）对受试者进行测试时，除后伸外的所有活动范围均有所减小。
