[The righting reaction in free fall in labyrinthectomized rats after a flight on the Kosmos-936 biosatellite].

The paper presents the experimental data on a turning over reaction in labyrinthectomized rats after 18.5 day flight on Cosmos 936. On Earth, the labyrinthectomized rats are found to exhibit with time an activation of gaze fixation reflex (GFR) which substitutes for labyrinth function when executed a turning over reaction. In microgravity, in the labyrinthectomized rats there is no activation of GFR and postflight turning over reaction is absent in the rats.