为了检查被试者对失重的适应能力,本实验采用了4h 头低位15°卧床方法模拟失重,观察了38名被试者在卧床中的耐受时间和脑阻抗图(REG)的变化,结果是短时间的头低位卧床期间REG 发生了规律性的变化,此变化反映了被试者脑循环系统状态,并与被试者卧床耐力一致。结果提示,短期头低位卧床可作为检查被试者失重适应能力的一种方法,而REG 是一个有用的评定指标。 In order to examine the ability of subjects to adapt to weightlessness, 4h head-low 15 ° bed-rest method was used to simulate weightlessness. Changes of 38 subjects in bed tolerance time and brain impedance map (REG) were observed. Results REG was a regular change during bedridden period, which reflected the brain circulatory system status of subjects and was consistent with the bed rest endurance of subjects. The results suggest that short-term head-lying bed rest may be used as a measure of subjects’ ability to adapt to weight loss, and REG is a useful assessment.