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为研究模拟失重因素对胃运动功能的影响，头低位－６°卧床条件下，观察被试者胃电图参数的变化。１５名男性青年自愿被试者平躺于－６°床上，卧床２１ｄ。用便携式胃电图机测定进餐前后的胃电图，并分析功率谱。结果表明，头低位－６°卧床初期，被试者出现不同程度的腹胀、腹痛和食欲差的感觉；卧床后体重显著降低（Ｐ＜０．０１）。在卧床８ｄ以后胃电图胃动过缓（＜２．４ｃｐｍ）的百分数明显增加，胃动过缓节律百分数餐前与餐后有显著差异（Ｐ＜０．０５）；胃动过缓节律的动力学系数显著降低，随卧床时间延长，胃电胃动过缓节律增多，这提示２１ｄ模拟失重因素明显地影响胃运动功能。
In order to study the effect of simulated weightlessness on gastric motor function, we observed the changes of gastric electrogastrogram parameters in subjects with head-down -6 °. Fifteen young volunteers were lying flat on -6 ° bed for 21 days. The electrogastrograph was used to measure the electrogastrogram before and after meals, and the power spectrum was analyzed. The results showed that at the early stage of -6 ° head-down, the subjects experienced different degrees of abdominal distension, abdominal pain and poor appetite. The body weight decreased significantly after bed rest (P <0.01). After 8 days of bedridden, the percentage of gastric electrogastrogram (<2.4cpm) increased obviously, and the percentage of bradyarrhythmic regularity was significantly different between pre-meal and post-meal (P <0.05); bradyarrhythmia Kinetic coefficient decreased significantly, with prolonged bed rest, gastric electrical activity increased bradycardia, suggesting that simulated weightlessness 21d significantly affect gastric motor function.