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Effects of adaptation of vestibulo-ocular reflex function on manual target localizationThe goal of the present study was to determine if adaptive modulation of vestibulo-ocular reflex (VOR) function is associated with commensurate alterations in manual target localization. To measure the effects of adapted VOR on manual responses we developed the Vestibular-Contingent Pointing Test (VCP). In the VCP test, subjects pointed to a remembered target following passive whole body rotation in the dark. In the first experiment, subjects performed VCP before and after wearing 0.5X minifying lenses that adaptively attenuate horizontal VOR gain. Results showed that adaptive reduction in horizontal VOR gain was accompanied by a commensurate change in VCP performance. In the second experiment, bilaterally labyrinthine deficient (LD) subjects were tested to confirm that vestibular cues were central to the spatial coding of both eye and hand movements during VCP. LD subjects performed significantly worse than normal subjects. These results demonstrate that adaptive change in VOR can lead to alterations in manual target localization.
Document ID
20040141449
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bloomberg, J. J.
(NASA Johnson Space Center Houston TX United States)
Merkle, L. A.
Barry, S. R.
Huebner, W. P.
Cohen, H. S.
Mueller, S. A.
Fordice, J.
Date Acquired
August 22, 2013
Publication Date
January 1, 2000
Publication Information
Publication: Journal of vestibular research : equilibrium & orientation
Volume: 10
Issue: 2
ISSN: 0957-4271
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Center JSC
NASA Discipline Neuroscience

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