Nov 2, 2014

Optimal visual-vestibular integration under conditions of conflicting intersensory motion profiles

Experimental Brain Research
John S ButlerHeinrich H Bülthoff

Abstract

Passive movement through an environment is typically perceived by integrating information from different sensory signals, including visual and vestibular information. A wealth of previous research in the field of multisensory integration has shown that if different sensory signals are spatially or temporally discrepant, they may not combine in a statistically optimal fashion; however, this has not been well explored for visual-vestibular integration. Self-motion perception involves the integration of various movement parameters including displacement, velocity, acceleration and higher derivatives such as jerk. It is often assumed that the vestibular system is optimized for the processing of acceleration and higher derivatives, while the visual system is specialized to process position and velocity. In order to determine the interactions between different spatiotemporal properties for self-motion perception, in Experiment 1, we first asked whether the velocity profile of a visual trajectory affects discrimination performance in a heading task. Participants performed a two-interval forced choice heading task while stationary. They were asked to make heading discriminations while the visual stimulus moved at a constant velocity (C...Continue Reading

Mentioned in this Paper

Visual System
Derivatives
Vision
Normal Statistical Distribution
Motion Perception
Passive Range of Motion Function
Visual Stimulus
Position Sense
Vestibular Diseases
Muscle Twitch

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