NDLI: Far and near target dynamic visual acuity: a functional assessment of canal and otolith performance

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Far and near target dynamic visual acuity: a functional assessment of canal and otolith performance

Content Provider	NASA Technical Reports Server (NTRS)
Author	Brady, Rachel A. Landsness, Eric C. Peters, Brian T. Bloomberg, Jacob J. Black, F. Owen
Copyright Year	2004
Description	Upon their return to earth, astronauts experience the effects of vestibular adaptation to microgravity. The postflight changes in vestibular information processing can affect postural and locomotor stability and may lead to oscillopsia during activities of daily living. However, it is likely that time spent in microgravity affects canal and otolith function differently. As a result, the isolated rotational stimuli used in traditional tests of canal function may fail to identify vestibular deficits after spaceflight. Also, the functional consequences of deficits that are identified often remain unknown. In a gaze control task, the relative contributions of the canal and otolith organs are modulated with viewing distance. The ability to stabilize gaze during a perturbation, on visual targets placed at different distances from the head may therefore provide independent insight into the function of this systems. Our goal was to develop a functional measure of gaze control that can also offer independent information about the function of the canal and otolith organs.
File Size	84570
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20050217191
Archival Resource Key	ark:/13960/t0cv9g635
Language	English
Publisher Date	2004-01-01
Access Restriction	Open
Subject Keyword	Optics Otolith Organs Viewing Astronauts Targets Space Flight Perturbation Microgravity Distance Adaptation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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