Studies Of The Vestibulo Ocular Reflex On Sts 4 5 And 6
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Studies Of The Vestibulo Ocular Reflex On Sts 4 5 And 6
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-11
Studies Of The Vestibulo Ocular Reflex On Sts 4 5 And 6 written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-11 with categories.
The vestibulo-ocular reflex (VOR) may be altered by weightlessness. Since this reflex plays a large role in visual stabilization, it was important to document any changes caused by space flight. This is a report on findings on STS-4 through 6 and is part of a larger study of neurosensory adaptation done on STS-4 through 8. Voluntary horizontal head oscillations at 1/3 Hz with amplitude of 30 deg right and left of center were recorded by a potentiometer and compared to eye position recorded by electroculography under the following conditions: eyes open, head fixed, tracking horizontal targets switched 0, 15, and 30 degrees right and left (optokinetic reflex - OKR - and calibration); eyes open and fixed on static external target with oscillation, (vestibulo ocular reflex, eyes closed - VOR EC); eyes open and wearing opaque goggles with target fixed in imagination (vestibulo-ocular reflex, eyes shaded - VOR ES); and eyes open and fixed on a head synchronized target with head oscillation (VOR suppression). No significant changes were found in voluntary head oscillation frequency or amplitude in those with (n=5), and without (n=3), space motion sickness (SMS), with phase of flight or test condition. Variations in head oscillation were too small to have produced detectable changes in test results. Thornton, William E. and Pool, Sam L. and Moore, Thomas P. and Uri, John J. Johnson Space Center RTOP 073-36-00-00-72...
Studies Of The Vestibulo Ocular Reflex On Sts 4 5 And 6
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Author :
language : en
Publisher:
Release Date : 1988
Studies Of The Vestibulo Ocular Reflex On Sts 4 5 And 6 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1989
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Aeronautics categories.
Studies Of The Horizontal Vestibulo Ocular Reflex On Sts 7 And 8
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-16
Studies Of The Horizontal Vestibulo Ocular Reflex On Sts 7 And 8 written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-16 with categories.
Unpaced voluntary horizontal head oscillation was used to study the Vestibulo-Ocular Reflex (VOR) on Shuttle flights STS 7 and 8. Ten subjects performed head oscillations at 0.33 Hz + or - 30 deg amplitude under the followng conditions: VVOR (visual VOR), eyes open and fixed on a stationary target; VOR-EC, with eyes closed and fixed on the same target in imagination; and VOR-S (VOR suppression), with eyes open and fixed on a head-synchronized target. Effects of weightlessness, flight phase, and Space Motion Sickness (SMS) on head oscillation characteristics were examined. A significant increase in head oscillation frequency was noted inflight in subjects free from SMS. In subjects susceptible to SMS, frequency was reduced during their Symptomatic period. The data also suggest that the amplitude and peak velocity of head oscillation were reduced early inflight. No significant changes were noted in reflex gain or phase in any of the test conditions; however, there was a suggestion of an increase in VVOR and VOR-ES gain early inflight in asymptomatic subjects. A significant difference in VOR-S was found between SMS susceptible and non-susceptible subjects. There is no evidence that any changes in VOR characteristics contributed to SMS. Thornton, William E. and Uri, John J. and Moore, Thomas P. and Pool, Sam L. Johnson Space Center...
Studies Of The Horizontal Vestibulo Ocular Reflex On Sts 7 And 8
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Author :
language : en
Publisher:
Release Date : 1988
Studies Of The Horizontal Vestibulo Ocular Reflex On Sts 7 And 8 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
Visual Suppression Of The Vestibulo Ocular Reflex During Space Flight
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Author :
language : en
Publisher:
Release Date : 1989
Visual Suppression Of The Vestibulo Ocular Reflex During Space Flight written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date : 1991
Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Government publications categories.
Monthly Catalogue United States Public Documents
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Author :
language : en
Publisher:
Release Date : 1991-05
Monthly Catalogue United States Public Documents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991-05 with Government publications categories.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1991-08
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991-08 with Science categories.
Fifth European Symposium On Life Sciences Research In Space
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Author : H. Oser
language : en
Publisher:
Release Date : 1994
Fifth European Symposium On Life Sciences Research In Space written by H. Oser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Life sciences categories.