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  Integration of vestibular and proprioceptive signals for spatial updating

Frissen, I., Campos, J., Souman, J., & Ernst, M. (2011). Integration of vestibular and proprioceptive signals for spatial updating. Experimental Brain Research, 212(2), 163-176. doi:10.1007/s00221-011-2717-9.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-BB04-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-B559-F
Genre: Journal Article

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 Creators:
Frissen, I1, 2, 3, Author              
Campos, JL2, 3, Author              
Souman, JL1, 2, 3, Author              
Ernst, MO1, 3, Author              
Affiliations:
1Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              
2Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Spatial updating during self-motion typically involves the appropriate integration of both visual and non-visual cues, including vestibular and proprioceptive information. Here, we investigated how human observers combine these two non-visual cues during full-stride curvilinear walking. To obtain a continuous, real-time estimate of perceived position, observers were asked to continuously point toward a previously viewed target in the absence of vision. They did so while moving on a large circular treadmill under various movement conditions. Two conditions were designed to evaluate spatial updating when information was largely limited to either proprioceptive information (walking in place) or vestibular information (passive movement). A third condition evaluated updating when both sources of information were available (walking through space) and were either congruent or in conflict. During both the passive movement condition and while walking through space, the pattern of pointing behavior demonstrated evidence of accurate egocentric updating. In contrast, when walking in place, perceived self-motion was underestimated and participants always adjusted the pointer at a constant rate, irrespective of changes in the rate at which the participant moved relative to the target. The results are discussed in relation to the maximum likelihood estimation model of sensory integration. They show that when the two cues were congruent, estimates were combined, such that the variance of the adjustments was generally reduced. Results also suggest that when conflicts were introduced between the vestibular and proprioceptive cues, spatial updating was based on a weighted average of the two inputs.

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 Dates: 2011-07
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1007/s00221-011-2717-9
BibTex Citekey: FrissenCSE2011
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Title: Experimental Brain Research
  Other : Exp. Brain Res.
Source Genre: Journal
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Publ. Info: Heidelberg : Springer-Verlag
Pages: - Volume / Issue: 212 (2) Sequence Number: - Start / End Page: 163 - 176 Identifier: ISSN: 0014-4819
CoNE: /journals/resource/954925398496