Visual perception of upright: Head tilt, visual errors and viewing eye
Identifieur interne : 001A67 ( Pmc/Corpus ); précédent : 001A66; suivant : 001A68Visual perception of upright: Head tilt, visual errors and viewing eye
Auteurs : Amir Kheradmand ; Grisel Gonzalez ; Jorge Otero-Millan ; Adrian LaskerSource :
- Journal of vestibular research : equilibrium & orientation [ 0957-4271 ] ; 2016.
Abstract
Perception of upright is often assessed by aligning a luminous line to the subjective visual vertical (SVV).
Here we investigated the effects of visual line rotation and viewing eye on SVV responses and whether there was any change with head tilt.
SVV was measured using a forced-choice paradigm and by combining the following conditions in 22 healthy subjects: head position (20° left tilt, upright and 20° right tilt), viewing eye (left eye, both eyes and right eye) and direction of visual line rotation (clockwise [CW] and counter clockwise [CCW]).
The accuracy and precision of SVV responses were not different between the viewing eye conditions in all head positions (
In spite of the challenges to the estimate of upright with head tilt, normal subjects did remarkably well irrespective of the viewing eye. The physiological significance of the asymmetry in the effect of line rotation between the head tilt positions is unclear but it suggests a lateralizing effect of head tilt on the visual perception of upright.
Url:
DOI: 10.3233/VES-160565
PubMed: 26890421
PubMed Central: 4890624
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