Visual and vestibular perceptual thresholds each demonstrate better precision at specific frequencies and also exhibit optimal integration
Identifieur interne : 000F04 ( Pmc/Checkpoint ); précédent : 000F03; suivant : 000F05Visual and vestibular perceptual thresholds each demonstrate better precision at specific frequencies and also exhibit optimal integration
Auteurs : Faisal Karmali [États-Unis] ; Koeun Lim [États-Unis] ; Daniel M. Merfeld [États-Unis]Source :
- Journal of Neurophysiology [ 0022-3077 ] ; 2013.
Abstract
Prior studies show that visual motion perception is more precise than vestibular motion perception, but it is unclear whether this is universal or the result of specific experimental conditions. We compared visual and vestibular motion precision over a broad range of temporal frequencies by measuring thresholds for vestibular (subject motion in the dark), visual (visual scene motion) or visual-vestibular (subject motion in the light) stimuli. Specifically, thresholds were measured for motion frequencies spanning a two-decade physiological range (0.05-5 Hz) using single-cycle sinusoidal acceleration roll tilt trajectories (i.e., distinguishing left-side down from right-side down). We found that, while visual and vestibular thresholds were broadly similar between 0.05 and 5.0 Hz, each cue is significantly more precise than the other at certain frequencies. Specifically, we found that
Url:
DOI: 10.1152/jn.00332.2013
PubMed: 24371292
PubMed Central: 4044428
Affiliations:
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<front><div type="abstract" xml:lang="en"><p>Prior studies show that visual motion perception is more precise than vestibular motion perception, but it is unclear whether this is universal or the result of specific experimental conditions. We compared visual and vestibular motion precision over a broad range of temporal frequencies by measuring thresholds for vestibular (subject motion in the dark), visual (visual scene motion) or visual-vestibular (subject motion in the light) stimuli. Specifically, thresholds were measured for motion frequencies spanning a two-decade physiological range (0.05-5 Hz) using single-cycle sinusoidal acceleration roll tilt trajectories (i.e., distinguishing left-side down from right-side down). We found that, while visual and vestibular thresholds were broadly similar between 0.05 and 5.0 Hz, each cue is significantly more precise than the other at certain frequencies. Specifically, we found that <italic>1</italic>
) visual and vestibular thresholds were indistinguishable at 0.05 Hz and 2 Hz (i.e., similarly precise); <italic>2</italic>
) visual thresholds were lower (i.e., vision more precise) than vestibular thresholds between 0.1 Hz and 1 Hz; and <italic>3</italic>
) visual thresholds were higher (i.e., vision less precise) than vestibular thresholds above 2 Hz. This shows that vestibular perception can be more precise than visual perception at physiologically relevant frequencies. We also found that sensory integration of visual and vestibular information is consistent with static Bayesian optimal integration of visual-vestibular cues. In contrast with most prior work that degraded or altered sensory cues, we demonstrated static optimal integration using natural cues.</p>
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<publisher-loc>Bethesda, MD</publisher-loc>
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<contrib-group><contrib contrib-type="author" corresp="yes"><name><surname>Karmali</surname>
<given-names>Faisal</given-names>
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<xref ref-type="aff" rid="aff1"><sup>1</sup>
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<xref ref-type="aff" rid="aff2"><sup>2</sup>
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<xref ref-type="aff" rid="aff1"><sup>1</sup>
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<contrib contrib-type="author"><name><surname>Merfeld</surname>
<given-names>Daniel M.</given-names>
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<xref ref-type="aff" rid="aff2"><sup>2</sup>
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Jenks Vestibular Physiology Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts; and</aff>
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Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts</aff>
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<author-notes><corresp id="cor1">Address for reprint requests and other correspondence: F. Karmali, <addr-line>Jenks Vestibular Physiology Laboratory, Massachusetts Eye and Ear Infirmary, 243 Charles St., Boston, MA 02114</addr-line>
(e-mail: <email>faisal_karmali@yahoo.com</email>
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<permissions><copyright-statement>Copyright © 2014 the American Physiological Society</copyright-statement>
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<copyright-holder>American Physiological Society</copyright-holder>
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<abstract><p>Prior studies show that visual motion perception is more precise than vestibular motion perception, but it is unclear whether this is universal or the result of specific experimental conditions. We compared visual and vestibular motion precision over a broad range of temporal frequencies by measuring thresholds for vestibular (subject motion in the dark), visual (visual scene motion) or visual-vestibular (subject motion in the light) stimuli. Specifically, thresholds were measured for motion frequencies spanning a two-decade physiological range (0.05-5 Hz) using single-cycle sinusoidal acceleration roll tilt trajectories (i.e., distinguishing left-side down from right-side down). We found that, while visual and vestibular thresholds were broadly similar between 0.05 and 5.0 Hz, each cue is significantly more precise than the other at certain frequencies. Specifically, we found that <italic>1</italic>
) visual and vestibular thresholds were indistinguishable at 0.05 Hz and 2 Hz (i.e., similarly precise); <italic>2</italic>
) visual thresholds were lower (i.e., vision more precise) than vestibular thresholds between 0.1 Hz and 1 Hz; and <italic>3</italic>
) visual thresholds were higher (i.e., vision less precise) than vestibular thresholds above 2 Hz. This shows that vestibular perception can be more precise than visual perception at physiologically relevant frequencies. We also found that sensory integration of visual and vestibular information is consistent with static Bayesian optimal integration of visual-vestibular cues. In contrast with most prior work that degraded or altered sensory cues, we demonstrated static optimal integration using natural cues.</p>
</abstract>
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