Abstract
The aim of this study was to evaluate the role of the vestibular system in cardiovascular control in a varying gravito-inertial field induced by parabolic flight. We measured variations in arterial pressure and heart rate in eight awake rats, four of which had undergone bilateral labyrinthectomy 3 months previously. While the control rats showed heart rate and mean arterial pressure modulations depending on gravity level, no such variation was observed in the lesioned rats. This study confirms the role of the vestibular system in cardiovascular control and opens up new prospects for interpreting cardiovascular variations observed during space flights.
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