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Lost in Space: graviceptive biasing of visual perception

Ferré, Elisa Raffaella and Frett, Timo and Acedo, Javier and Haggard, Patrick (2017) Lost in Space: graviceptive biasing of visual perception. In: British Neuroscience Association BNA 2017 Abstract Book. British Neuroscience Association: Festival of Neuroscience 2017, 10.-13.April 2017, Birmingham, UK.

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Official URL: https://www.bna.org.uk/static/uploads/resources/BNA2017_ABSTRACT_BOOK_SAGE_FINAL.pdf


Our brain receives a series of sensory snapshots of the external world, which it must integrate to provide a description of the Scenes around us. Vestibular inputs monitor changes in the position of the body relative to the environment. Here we tested thehypothesis that the vestibular system contributes to bridging the gap between successive visual snapshots of the external world. Accordingly, if gravitational signals provided by the vestibular organs cannot be aligned with those from vision, altered perceptual experiences may occur. This might underlie perceptual errors reported by pilots and astronauts exposed to altered gravitational forces. We investigated the contribution of vestibular-gravitational signals to the process of updating perception of a series of visual scenes. Ten participants were seated facing outwards on a short arm human centrifuge (SAHC) platform, which simulated 1 +Gz artificial gravity for ten minutes at head level. A visual judgement task was performed at normal gravity baseline and during 1 +Gz artificial gravity, in counterbalanced order. An environmental scene (Scene A) was followed after a short delay by a second scene (B) involving slight perspectival modification of Scene A. The scenes differed either in angular perspective (as if the participant had turned leftwards or rightwards during the delay) or in translational perspective (as if the participant had moved forward or backwards). Participants judged whether the implied viewpoint change between the first and second scene corresponded to a left/right-ward rotation (angular perspective), or to an approach/retreat (translational perspective). Artificial gravity influenced the perceived relation between the visual images: participants judged the second scene as significantly closer during 1 +Gz artificial gravity compared to a normal gravity baseline (t(9)=2.568, p=0.030). No differences were found in judgements of angular perspective. This dissociation rules out non-specific effects of artificial gravity or centrifugation which cannot readily explain this specificity. Our results support a vestibular-driven updating process in which gravity signals are computed to provide a dynamic description of the spatial position of the body relative to the external environment.

Item URL in elib:https://elib.dlr.de/111910/
Document Type:Conference or Workshop Item (Speech, Poster)
Title:Lost in Space: graviceptive biasing of visual perception
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ferré, Elisa RaffaellaDepartment of Psychology Royal Holloway University of LondonUNSPECIFIED
Frett, TimoTimo.Frett (at) dlr.dehttps://orcid.org/0000-0002-5572-1177
Acedo, JavierStarlab BarcelonaUNSPECIFIED
Haggard, PatrickDepartment of Psychology Royal Holloway University of LondonUNSPECIFIED
Date:12 April 2017
Journal or Publication Title:British Neuroscience Association BNA 2017 Abstract Book
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Artificial Gravity, Vestibular, Centrifuge
Event Title:British Neuroscience Association: Festival of Neuroscience 2017
Event Location:Birmingham, UK
Event Type:international Conference
Event Dates:10.-13.April 2017
Organizer:British Neuroscience Association
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Operationelle Forschung Kurzarmzentrifuge
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Biomedical Research
Deposited By: Frett, Timo
Deposited On:20 Apr 2017 12:28
Last Modified:20 Apr 2017 12:28

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