Lackner J R, DiZio P
Ashton Graybiel Spatial Orientation Laboratory, Brandeis University, Waltham, Massachusetts 02254.
Percept Mot Skills. 1989 Jun;68(3 Pt 1):784-6.
Mechanical unloading during head movements in weightlessness may be an etiological factor in space-motion sickness. We simulated altered head loading on Earth without affecting vestibular stimulation by having subjects wear a weighted helmet. Eight subjects were exposed to constant velocity rotation about a vertical axis with direction reversals every 60 sec. for eight reversals with the head loaded and eight with the head unloaded. The severity of motion sickness elicited was significantly higher when the head was loaded. This suggests that altered sensory-motor control of the head is also an etiological factor in space-motion sickness.
失重状态下头运动期间的机械卸载可能是太空晕动病的一个病因。我们在地球上模拟了头部负荷的改变，同时通过让受试者佩戴加重头盔来不影响前庭刺激。八名受试者以恒定速度绕垂直轴旋转，每60秒方向反转一次，头部加载时进行八次反转，头部卸载时进行八次反转。头部加载时引发的晕动病严重程度明显更高。这表明头部感觉运动控制的改变也是太空晕动病的一个病因。
