Article

Interindividual differences influence the multisensory integration process
involved in spatial perception. Here, we assessed the effect of visual field
dependence on self-tilt detection relative to upright, as a function of static
vs. slow changing visual or postural cues. To that aim, we manipulated slow
rotations (i.e., 0.05 degrees s(-1)) of the body and/or the visual scene in
pitch. Participants had to indicate whether they felt being tilted forward at
successive angles. Results show that thresholds for self-tilt detection
substantially differed between visual field dependent/independent subjects, when
only the visual scene was rotated. This difference was no longer present when the
body was actually rotated, whatever the visual scene condition (i.e., absent,
static or rotated relative to the observer). These results suggest that the
cancellation of visual field dependence by dynamic postural cues may rely on a
multisensory reweighting process, where slow changing vestibular/somatosensory
inputs may prevail over visual inputs.
CI - Copyright (c) 2014 Elsevier B.V. All rights reserved.

Langue : ANGLAIS