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Tracking the emergence of location-based spatial representations in human scene-selective cortex

View ORCID ProfileSam C. Berens, View ORCID ProfileBárður H Joensen, View ORCID ProfileAidan J. Horner
doi: https://doi.org/10.1101/547976
Sam C. Berens
1Department of Psychology, University of York, UK
2Department of Psychology, University of Sussex, UK
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  • For correspondence: s.berens@sussex.ac.uk aidan.horner@york.ac.uk
Bárður H Joensen
1Department of Psychology, University of York, UK
3Institute of Cognitive Neuroscience, UCL, UK
4Institute of Neurology, UCL, UK
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Aidan J. Horner
1Department of Psychology, University of York, UK
5York Biomedical Research Institute, University of York, UK
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  • For correspondence: s.berens@sussex.ac.uk aidan.horner@york.ac.uk
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Abstract

Scene-selective regions of the human brain form allocentric representations of locations in our environment. These representations are independent of heading direction and allow us to know where we are regardless of our direction of travel. However, we know little about how these location-based representations are formed. Using fMRI representational similarity analysis and linear mixed-models, we tracked the emergence of location-based representations in scene-selective brain regions. We estimated patterns of activity for two distinct scenes, taken before and after participants learnt they were from the same location. During a learning phase, we presented participants with two types of panoramic videos: (1) an overlap video condition displaying two distinct scenes (0° and 180°) from the same location, and (2) a no-overlap video displaying two distinct scenes from different locations (that served as a control condition). In the parahippocampal cortex (PHC) and retrosplenial cortex (RSC), representations of scenes from the same location became more similar to each other only after they had been shown in the overlap condition, suggesting the emergence of viewpoint-independent location-based representations. Whereas these representations emerged in the PHC regardless of task performance, RSC representations only emerged for locations where participants could behaviourally identify the two scenes as belonging to the same location. The results suggest that we can track the emergence of location-based representations in the PHC and RSC in a single fMRI experiment. Further, they support computational models that propose the RSC plays a key role in transforming viewpoint-independent representations into behaviourally-relevant representations of specific viewpoints.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • Updates made on Sunday 18th October 2020 following a round of peer-review.

  • https://osf.io/cgy97

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted October 18, 2020.
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Tracking the emergence of location-based spatial representations in human scene-selective cortex
Sam C. Berens, Bárður H Joensen, Aidan J. Horner
bioRxiv 547976; doi: https://doi.org/10.1101/547976
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Tracking the emergence of location-based spatial representations in human scene-selective cortex
Sam C. Berens, Bárður H Joensen, Aidan J. Horner
bioRxiv 547976; doi: https://doi.org/10.1101/547976

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