Visual and vestibular perceptual thresholds each demonstrate better precision at specific frequencies and also exhibit optimal integration
Identifieur interne : 001438 ( Pmc/Corpus ); précédent : 001437; suivant : 001439Visual and vestibular perceptual thresholds each demonstrate better precision at specific frequencies and also exhibit optimal integration
Auteurs : Faisal Karmali ; Koeun Lim ; Daniel M. MerfeldSource :
- 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
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