Motion Perception: Vestibular Adaptation to G-Transitions (MOP) will provide insight in the process of vestibular adaptation to a gravity transition. Adaptation will be assessed by rating motion perception as a result of body movements. MOP will also correlate susceptibility to space adaptation syndrome (SAS) with susceptibility to sickness induced by centrifugation (SIC). The experimental results will allow the team to establish the time course of the adaptation process and thereby set a further step in the determination of key parameters in vestibular adaptation.Principal Investigator(s)
TNO Human Factors, Soesterberg, , Netherlands
European Space Agency (ESA)Sponsoring Organization
Information PendingResearch Benefits
Information PendingISS Expedition Duration:
October 2003 - October 2009Expeditions Assigned
8,9,10,11,16,18,19/20Previous ISS Missions
The main scientific objective of this experiment is to gain insight into the process of how the body's vestibular system adapts to the absence of gravity. In humans, the vestibular system together with visual information determines the body's coordination, posture and balance and the perception of movement and orientation.
The adaptation in the vestibular system will be assessed by comparing the perception of motion against the real movement of the body. To this end, the astronaut will be asked to fill in a short questionnaire every day during the spaceflight, wherein he reports his motion sensation as a result of head movements around the three principal axes. Head movements are important in the experiment as the inner ear is the location of the sensory organs of the vestibular system.
The astronaut will also be questioned on whether he experiences any discomfort regarding space adaptation syndrome, commonly known as `space sickness', caused by their daily activities. A second objective of the Motion Perception experiment is to correlate an astronaut's susceptibility to space sickness with a susceptibility to sickness induced by centrifugation. Sickness induced by centrifugation is a condition with similarities to space sickness. A pre-flight ground experiment will be performed wherein the astronaut's susceptibility to sickness induced by centrifugation is assessed by exposing him to hypergravity (approximately 3g) in a centrifuge.
Information PendingEarth Applications
Information PendingOperational Protocols
Vestibular adaptation to a gravity transition is assessed by rating motion perception as a result of body movements. To this end, the cosmonauts are asked to fill in a short questionnaire every day during the spaceflight, wherein they report their motion sensation as a result of head movements, and whether they experience any discomfort regarding SAS caused by their daily activities. Emphasis will lie on the effect of head movements around the three principal axes. To correlate susceptibility to SAS with susceptibility to SIC, prior to the spaceflight, a ground experiment is performed wherein the cosmonauts susceptibility to SIC is assessed. The cosmonaut will be exposed to hypergravity (a load of 3Gx for 1 hour) in a human centrifuge. Before and after the centrifuge run, some vestibular tests are performed 3D-tilt chair, operated in the pitch mode. to identify possible adaptation parameters
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