[Features of the lifting reflex in the white rat following prolonged space flight (effect of weightlessness and artificial gravity)].
The latent time of the lifting reflex (LTLR) was studied in weightless and centrifuged SPF-Wistar rats before and after 19-day space flights onboard Cosmos-936 and 1129. The LTLR was determined when the lifting reflex was induced in a special trainer on the basis of the mechanical component of muscle reaction (MCMR) and electromyography of the oculomotor and gastrocnemius muscles. The LTLR persisted in all the animals postflight. The LTLR of weightless rats as determined by the MCMR increased significantly, and as determined by electromyography, remained unchanged. Centrifuged rats did not show significant changes in the LPLR. It is believed that the initial stages of the lifting reaction - vestibular receptors and conductive pathways - remained unaltered in weightlessness. Changes in the LPLR observed after prolonged space flights are consequent on muscle function, representing the final stage of the lifting reflex.
D000818:Animals; D006112:Gravitation; D008297:Male; D009132:Muscles / Q000502:physiology*; D051381:Rats; D011919:Rats, Inbred Strains; D011930:Reaction Time / Q000502:physiology; D012018:Reflex / Q000502:physiology*; D013026:Space Flight; D013997:Time Factors; D014722:Vestibule, Labyrinth / Q000502:physiology*; D014893:Weightlessness
Osobennosti liftnoĭ reaktsii u belykh krys posle dlitel'nogo kosmicheskogo poleta (vliianie nevesomosti i iskusstvennoĭ sily tiazhesti).