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Related Experiment Video

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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

Audiogravic and oculogravic illusions represent a unified spatial remapping.

James R Lackner¹, Paul DiZio

¹Ashton Graybiel Spatial Orientation Laboratory, MS 033, Brandeis University, Waltham, MA 02454-9110, USA. lackner@brandeis.edu

Experimental Brain Research

|January 12, 2010

Summary

Altered gravity (GIA) illusions affect visual, auditory, and tactile senses. These illusions suggest a remapping of personal space perception due to changes in gravitoinertial acceleration.

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Area of Science:

Neuroscience
Human Perception
Vestibular System

Background:

Gravitoinertial acceleration (GIA) influences spatial orientation and sensory localization.
Oculogravic, audiogravic, and somatogravic illusions demonstrate sensory changes under altered GIA.
Understanding these illusions is crucial for human spaceflight and virtual reality.

Purpose of the Study:

To quantify the audiogravic and oculogravic illusions under altered GIA.
To investigate the parallel changes in auditory, visual, and haptic localization.
To explore the underlying spatial remapping mechanisms.

Main Methods:

Recumbent subjects (n=6) were exposed to a 2g increase and 60° GIA vector rotation in a slow rotation room.
Subjects indicated apparent locations of auditory/visual targets and head midline.
Onset asynchrony of vibrotactile stimuli was adjusted to assess fused midline sensation.

Main Results:

Parallel, time-linked shifts in auditory, visual, and haptic localization were observed.
These shifts were comparable in magnitude and direction.
A vibrotactile shift occurred in the same direction as other sensory shifts.

Conclusions:

Altered GIA induces a multimodal remapping of peripersonal spatial reference frames.
This remapping underlies changes in auditory, visual, and somatosensory localization.
Vestibular, somatosensory, and oculomotor systems likely contribute to this reference system shift.