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Biological movement and the encoding of its motion and orientation

Benton, Christopher P.; Thirkettle, Martin and Scott-Samuel, Nicholas E. (2016). Biological movement and the encoding of its motion and orientation. Scientific reports, 6 p. 22393.

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URL: http://dx.doi.org/10.1038/srep22393
DOI (Digital Object Identifier) Link: https://doi.org/10.1038/srep22393
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Abstract

Are you walking at me? Biological movement and the encoding of its motion and orientation. A person’s motion conveys a wealth of information that ranges from the complex, such as intention or emotional state, to the simple, such as direction of locomotion. How we recognise and recover people’s motion is addressed by models of biological motion processing. Single channel models propose that this occurs through the operation of form template neurons which respond to viewpoint dependent snapshots of posture. More controversially, a dual channel approach proposes a second stream containing motion template neurons sensitive to view dependent snapshots of biological movement’s characteristic local velocity field. We used behavioural adaptation to look for the co-encoding of viewpoint and walker motion, a hallmark of motion template analysis. We show that opposite viewpoint aftereffects can simultaneously be induced for forwards and reversed walkers. This demonstrates that distinct populations of neurons encode forwards and reversed walking. To account for such aftereffects, these units must either be able to inhibit viewpoint-encoding neurons, or they must encode viewpoint directly. Whereas current single channel models would need extending to incorporate these characteristics, the idea that walker motion is encoded directly, such that viewpoint and motion are intrinsically interlinked, is a fundamental component of the dual channel model.

Item Type: Journal Item
ISSN: 2045-2322
Project Funding Details:
Funded Project NameProject IDFunding Body
The encoding of heading in biological motionSG110865British Academy
Keywords: human behaviour; motion detection; object vision
Academic Unit/School: Faculty of Arts and Social Sciences (FASS) > Psychology
Faculty of Arts and Social Sciences (FASS)
Interdisciplinary Research Centre: Harm and Evidence Research Collaborative (HERC)
Item ID: 45604
Depositing User: Martin Thirkettle
Date Deposited: 15 Mar 2016 11:15
Last Modified: 05 Oct 2016 11:56
URI: http://oro.open.ac.uk/id/eprint/45604
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