Postflight test of the effect of spaceflight on ability to combine rotation and tilt cues Merfeld DM(1996). Effect of spaceflight on the ability to sense and control roll tilt Human neurovestibular experiments on Spacelab Life Sciences 2. Journal of Applied Physiology 81(1): 50-57Postflight test of the effect of spaceflight on ability to combine rotation and tilt cues Merfeld DM (1996). Effect of spaceflight on the ability to sense and control roll tilt: Human neurovestibular experiments on Spacelab Life Sciences 2. Journal of Applied Physiology 81(1):50-57