Ultrastructural development of the vestibular system under conditions of simulated weightlessness.

  • J Neubert
  • 1979


Electronmicroscopy was used to track the development of the gravity system of frog embryos and larvae which have bred for 5, 7, and 10 d after egg fertilization under conditions of simulated weightlessness on the fast-running horizontal clinostat. Although no differences in the morphologic structure of the organ between test and control animals could be found up to 7 d of development, there is a significant accumulation of vacuoles in sensory epithelia of frog larvae develpoping for 10 d (stage 17) in simulated zero G.