Human Aerospace Laboratory, Department of Neurology, Mt. Sinai School of Medicine, New York, NY 10029, USA.
Exp Brain Res. 2010 Aug;204(4):617-22. doi: 10.1007/s00221-010-2317-0. Epub 2010 Jun 10.
We studied spatial orientation before and after 21 days of 6 degrees head-down bed rest in 15 subjects. During bed rest, 8 subjects were treated daily with 1 h Gz centrifugation (artificial gravity) (2.5 g at the feet; 1.0 g at the heart), with 7 subjects serving as controls. Ocular counter-rolling and subjective visual vertical were assessed during 90 degrees whole body roll tilt to the left and right. Ocular counter-rolling was unaffected by bed rest and bed rest + artificial gravity. Performance on the subjective visual vertical task was unchanged in the control group, but exhibited a significant increase in error for 48 h after bed rest in the treatment (artificial gravity) group. Intermittent application of linear acceleration along the long body axis may have increased the weighting of the idiotropic vector, resulting in an increased bias of the subjective visual vertical toward the long body axis during 90 degrees roll tilt.
我们研究了 15 名受试者在 21 天 6 度头低位卧床休息前后的空间定位。在卧床休息期间，8 名受试者每天接受 1 小时 2g （地心引力）的离心力（脚部 2.5g，心脏 1.0g）治疗，7 名受试者作为对照组。在向左侧和右侧 90 度全身滚动倾斜期间，评估眼球反向滚动和主观视觉垂直。卧床休息和卧床休息+人工重力对眼球反向滚动没有影响。对照组在主观视觉垂直任务上的表现没有变化，但在治疗（人工重力）组卧床休息后 48 小时，误差明显增加。沿着长身体轴间歇性施加线性加速度可能增加了向性矢量的权重，导致在 90 度滚动倾斜期间，主观视觉垂直向长身体轴的偏差增加。
