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  Parietal Representations of Egocentric Space include unseen Locations

Schindler, A., & Bartels, A. (2014). Parietal Representations of Egocentric Space include unseen Locations. In A. Schütz, K. Drewing, & K. Gegenfurtner (Eds.), 56th Conference of Experimental Psychologists (TeaP 2014) (pp. 229). Lengerich, Germany: Pabst.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-3414-E Version Permalink: http://hdl.handle.net/21.11116/0000-0007-668B-A
Genre: Meeting Abstract

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 Creators:
Schindler, A1, 2, Author              
Bartels, A1, 2, Author              
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: Our subjective experience links covert visual and egocentric spatial attention seamlessly. However, the latter can extend beyond the visual field, covering all directions relative to our body. Even with closed eyes we can rotate from the computer screen to face the window with little loss of accuracy, and once rotated we are aware of the computer’s updated egocentric position. It appears thus that our egocentric model includes seen and unseen locations. In contrast to visual representations, little is known about unseen egocentric representations in the healthy brain. Parietal cortex appears to be involved in both, because its lesions can lead to deficits in visual attention, but also to a disorder of egocentric spatial awareness, known as hemispatial neglect. In this study, our participants performed a novel egocentric orientation task inside an octagonal room. Once they were familiar with this setup, we exposed our participants to a virtual version of the same paradigm during fMRI recordings. We found egocentric unseen space represented by patterns of voxel activity in parietal cortex, independent of visual information. Intriguingly, the best decoding performances corresponded to brain areas associated with visual covert attention and reaching, as well as to lesion sites associated with spatial neglect.

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 Dates: 2014-04
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: BibTex Citekey: SchindlerB2014
DOI: 10.23668/psycharchives.877
 Degree: -

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Title: 56th Conference of Experimental Psychologists (TeaP 2014)
Place of Event: Giessen, Germany
Start-/End Date: 2014-03-31 - 2014-04-02

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Title: 56th Conference of Experimental Psychologists (TeaP 2014)
Source Genre: Proceedings
 Creator(s):
Schütz, AC, Editor
Drewing, K1, Editor            
Gegenfurtner, KR, Editor            
Affiliations:
1 External Organizations, ou_persistent22            
Publ. Info: Lengerich, Germany : Pabst
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 229 Identifier: ISBN: 978-3-89967-915-1