加速度生理对人体在暴露于+4.5Gz时,仍能维持脑循环的解释是由于颈静脉处透壁压的增加,使管腔缩小,增加了回心血流的阻力,有利于维持脑静脉压和虹吸管效应。但是缺乏直接的有说服力的实验证据。为此,我们设计了环形加压颈囊,可人为的用颈囊充压增加囊下颈静脉血流阻力,用同位素示踪方法观察了颈囊加压的提高脑血容作用。 Acceleration Physiology Exposure to +4.5 Gz when the human body can still maintain the interpretation of the cerebral circulation is due to the increase of transmural pressure at the jugular venous, reducing the lumen, increasing the flow of blood back to the resistance, is conducive to maintaining cerebral venous pressure And siphon effect. But there is no direct and convincing experimental evidence. To this end, we designed a ring-shaped compression balloon, which can be artificially increased with the pressure on the subcapital neck vein blood pressure, isotope tracer method used to observe the effect of cervical capsule pressure to improve cerebral blood volume.