| The relative role of visual and non-visual cues in determining the perceived direction of "up": experiments in parabolic flight. | |
| | |
MedLine Citation:
|
PMID: 15838949 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
|
In order to measure the perceived direction of "up", subjects judged the three-dimensional shape of disks shaded to be compatible with illumination from particular directions. By finding which shaded disk appeared most convex, we were able to infer the perceived direction of illumination. This provides an indirect measure of the subject's perception of the direction of "up". The different cues contributing to this percept were separated by varying the orientation of the subject and the orientation of the visual background relative to gravity. We also measured the effect of decreasing or increasing gravity by making these shape judgements throughout all the phases of parabolic flight (0 g, 2 g and 1 g during level flight). The perceived up direction was modeled by a simple vector sum of "up" defined by vision, the body and gravity. In this model, the weighting of the visual cue became negligible under microgravity and hypergravity conditions. |
| | |
Authors:
|
H L Jenkin; R T Dyde; J E Zacher; D C Zikovitz; M R Jenkin; R S Allison; I P Howard; L R Harris |
Related Documents
:
|
16647739 - Perception of visual motion coherence by rats and mice. 17897399 - Directional responses of visual wulst neurones to grating and plaid patterns in the awa... 11719199 - Visual motion processing investigated using contrast agent-enhanced fmri in awake behav... 8594819 - On the relative contributions of motion energy and transparency to the perception of mo... 10615459 - Does binocular disparity facilitate the detection of transparent motion? 12536139 - Segregation from direction differences in dynamic random-dot stimuli. 17507529 - Relationship between positive clinical outcomes of foot orthotic treatment and changes ... 21558639 - A re-investigation of the role of utricular asymmetries in space motion sickness. 16985549 - Sidelobe suppression design of etched diffraction grating demultiplexers using optimize... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: Acta astronautica Volume: 56 ISSN: 0094-5765 ISO Abbreviation: Acta Astronaut Publication Date: 2005 May-Jun |
Date Detail:
|
Created Date: 2005-04-18 Completed Date: 2005-04-28 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 9890631 Medline TA: Acta Astronaut Country: England |
Other Details:
|
Languages: eng Pagination: 1025-32 Citation Subset: S |
Copyright Information:
|
c2005 Elsevier Ltd. All rights reserved. |
Affiliation:
|
Centre for Vision Research, York University, Toronto, Ontario, Canada. |
Space Flight Mission:
|
Flight Experiment; Parabolic Flight; manned; short duration |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Cues* Gravitation* Human Engineering Humans Hypergravity* Orientation* Posture Psychomotor Performance Space Flight* Space Perception Visual Perception* Weightlessness* Weightlessness Countermeasures |
| Investigator | |
Investigator/Affiliation:
|
C M Oman / MA Inst Technol, Cambridge |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Toward optimizing lighting as a countermeasure to sleep and circadian disruption in space flight.
Next Document: Aggregation and breakup of colloidal particle aggregates in shear flow, studied with video microscop...