6 Result(s)
within
Gilles Clément
Science, Humanities and Social Sciences, multidisciplinary
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Article
Open AccessEffects of motion paradigm on human perception of tilt and translation
The effect of varying sinusoidal linear acceleration on perception of human motion was examined using 4 motion paradigms: off-vertical axis rotation, variable radius centrifugation, linear lateral translation,...
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Article
Open AccessHorizontal and Vertical Distance Perception in Altered Gravity
The perception of the horizontal and vertical distances of a visual target to an observer was investigated in parabolic flight during alternating short periods of normal gravity (1 g). microgravity (0 g), and ...
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Article
Open AccessOcular Counter Rolling in Astronauts After Short- and Long-Duration Spaceflight
Ocular counter-rolling (OCR) is a reflex generated by the activation of the gravity sensors in the inner ear that stabilizes gaze and posture during head tilt. We compared the OCR measures that were obtained i...
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Article
Open AccessEye-Head Coordination in 31 Space Shuttle Astronauts during Visual Target Acquisition
Between 1989 and 1995, NASA evaluated how increases in flight duration of up to 17 days affected the health and performance of Space Shuttle astronauts. Thirty-one Space Shuttle pilots participating in 17 spac...
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Article
Open AccessOcular Reflex Phase during Off-Vertical Axis Rotation in Humans is Modified by Head-Turn-On-Trunk Position
Constant velocity Off-Vertical Axis Rotation (OVAR) imposes a continuously varying orientation of the head and body relative to gravity, which generates a modulation of horizontal (conjugate and vergence), ver...
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Article
Open AccessDysfunctional vestibular system causes a blood pressure drop in astronauts returning from space
It is a challenge for the human body to maintain stable blood pressure while standing. The body’s failure to do so can lead to dizziness or even fainting. For decades it has been postulated that the vestibular...
