Journal
EXPERIMENTAL BRAIN RESEARCH
Volume 233, Issue 5, Pages 1409-1420Publisher
SPRINGER
DOI: 10.1007/s00221-015-4215-y
Keywords
Vestibular; Manual control; Roll tilt; Sensorimotor; Adaptation; Hyper-gravity
Categories
Funding
- National Space Biomedical Research Institute (NSBRI) through NASA [NCC9-58]
- National Institute on Deafness and Other Communication Disorders (NIDCD)/National Institutes of Health (NIH) [R01 DC04158]
- NASTAR Center
Ask authors/readers for more resources
Hyper-gravity provides a unique environment to study how misperceptions impact control of orientation relative to gravity. Previous studies have found that static and dynamic roll tilts are perceptually overestimated in hyper-gravity. The current investigation quantifies how this influences control of orientation. We utilized a long-radius centrifuge to study manual control performance in hyper-gravity. In the dark, subjects were tasked with nulling out a pseudo-random roll disturbance on the cab of the centrifuge using a rotational hand controller to command their roll rate in order to remain perceptually upright. The task was performed in 1, 1.5, and 2 G's of net gravito-inertial acceleration. Initial performance, in terms of root-mean-square deviation from upright, degraded in hyper-gravity relative to 1 G performance levels. In 1.5 G, initial performance degraded by 26 % and in 2 G, by 45 %. With practice, however, performance in hyper-gravity improved to near the 1 G performance level over several minutes. Finally, pre-exposure to one hyper-gravity level reduced initial performance decrements in a different, novel, hyper-gravity level. Perceptual overestimation of roll tilts in hyper-gravity leads to manual control performance errors, which are reduced both with practice and with pre-exposure to alternate hyper-gravity stimuli.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available