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Yaw sensory rearrangement alters pitch vestibulo-ocular reflex responsesTen male subjects underwent two types of adaptation paradigm designed either to enhance or to attenuate the gain of the canal-ocular reflex (COR), before undergoing otolith-ocular reflex (OOR) testing with constant velocity, earth horizontal axis and pitch rotation. The adaptation paradigm paired a 0.2 Hz sinusoidal rotation about an earth vertical axis with a 0.2 Hz optokinetic stimulus that was deliberately mismatched in peak velocity or phase and was designed to produce short-term changes in the COR. Preadaptation and postadaptation OOR tests occurred at a constant velocity of 60 degrees/sec in the dark and produced a modulation component of the slow phase velocity with a frequency of 0.16 Hz due to otolithic stimulation by the sinusoidally changing gravity vector. Of the seven subjects who showed enhancement of the COR gain, six also showed enhancement of the OOR modulation component. Of the seven subjects who showed attenuation of the COR gain, five also showed attenuation of the OOR modulation component. The probability that these two cross-axis adaptation effects would occur by chance is less than 0.02. This suggests that visual-vestibular conditioning of the yaw axis COR also induced changes in the pitch axis OOR. We thus postulate that the central nervous system pathways that process horizontal canal yaw stimuli have elements in common with those processing otolithic stimuli about the pitch axis.
Document ID
20040172872
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Petropoulos, A. E.
(Harvard Medical School Massachusetts Eye & Ear Infirmary, Boston 02114, United States)
Wall, C. 3rd
Oman, C. M.
Date Acquired
August 22, 2013
Publication Date
September 1, 1997
Publication Information
Publication: Acta oto-laryngologica
Volume: 117
Issue: 5
ISSN: 0001-6489
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: RO1-DC00290
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Neuroscience
Non-NASA Center

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