NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Behavioral analysis of signals that guide learned changes in the amplitude and dynamics of the vestibulo-ocular reflexWe characterized the dependence of motor learning in the monkey vestibulo-ocular reflex (VOR) on the duration, frequency, and relative timing of the visual and vestibular stimuli used to induce learning. The amplitude of the VOR was decreased or increased through training with paired head and visual stimulus motion in the same or opposite directions, respectively. For training stimuli that consisted of simultaneous pulses of head and target velocity 80-1000 msec in duration, brief stimuli caused small changes in the amplitude of the VOR, whereas long stimuli caused larger changes in amplitude as well as changes in the dynamics of the reflex. When the relative timing of the visual and vestibular stimuli was varied, brief image motion paired with the beginning of a longer vestibular stimulus caused changes in the amplitude of the reflex alone, but the same image motion paired with a later time in the vestibular stimulus caused changes in the dynamics as well as the amplitude of the VOR. For training stimuli that consisted of sinusoidal head and visual stimulus motion, low-frequency training stimuli induced frequency-selective changes in the VOR, as reported previously, whereas high-frequency training stimuli induced changes in the amplitude of the VOR that were more similar across test frequency. The results suggest that there are at least two distinguishable components of motor learning in the VOR. One component is induced by short-duration or high-frequency stimuli and involves changes in only the amplitude of the reflex. A second component is induced by long-duration or low-frequency stimuli and involves changes in the amplitude and dynamics of the VOR.
Document ID
20040173096
Document Type
Reprint (Version printed in journal)
Authors
Raymond, J. L. (University of California San Francisco 94143, United States)
Lisberger, S. G.
Date Acquired
August 22, 2013
Publication Date
December 1, 1996
Publication Information
Publication: The Journal of neuroscience : the official journal of the Society for Neuroscience
Volume: 16
Issue: 23
ISSN: 0270-6474
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: EY10198
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Neuroscience
Non-NASA Center