The effect of spaceflight on the otolith-mediated ocular counter-roll
Visualitza/Obre
10.5821/conference-9788419184405.122
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/370789
Tipus de documentComunicació de congrés
Data publicació2022-04-29
EditorUniversitat Politècnica de Catalunya
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
Abstract
The otoliths of the vestibular system are seen as the primary gravitational sensors and are responsible for a compensatory eye torsion called the ocular counter-roll (OCR). The OCR ensures gaze stabilization and is sensitive to a lateral head roll with respect to gravity and the Gravito-Inertial Acceleration (GIA) vector during e.g., centrifugation. This otolith-mediated reflex will make sure you will still be able to maintain gaze stabilization and postural stability when making sharp turns during locomotion. To measure the effect of prolonged spaceflight on the otoliths, we measured the OCR induced by off-axis centrifugation in a group of 27 cosmonauts before and after their 6-month space mission to the International Space Station (ISS). We observed a significant decrease in OCR early post-flight, with first- time flyers being more strongly affected compared to frequent or experienced flyers. Our results strongly suggest that experienced space crew have acquired the ability to adapt faster after G-transitions and should therefore be sent for more challenging space missions, e.g., Moon or Mars, because they are noticeably less affected by microgravity regarding their vestibular system.
CitacióSchoenmaekers, C. [et al.]. The effect of spaceflight on the otolith-mediated ocular counter-roll. A: "4th Symposium on Space Educational Activities". Universitat Politècnica de Catalunya, 2022,
ISBN9788419184405
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