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  Walking along curved paths of different angles: the relationship between head and trunk turning

Sreenivasa, M., Frissen, I., Souman, J., & Ernst, M. (2008). Walking along curved paths of different angles: the relationship between head and trunk turning. Experimental Brain Research, 191(3), 313-320. doi:10.1007/s00221-008-1525-3.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-C6BB-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-2CF6-7
Genre: Journal Article

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Sreenivasa, MN1, 2, 3, Author              
Frissen, I1, 2, 3, Author              
Souman, JL1, 2, 3, Author              
Ernst, MO2, 3, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Walking along a curved path requires coordinated motor actions of the entire body. Here, we investigate the relationship between head and trunk movements during walking. Previous studies have found that the head systematically turns into turns before the trunk does. This has been found to occur at a constant distance rather than at a constant time before a turn. We tested whether this anticipatory head behavior is spatially invariant for turns of different angles. Head and trunk positions and orientations were measured while participants walked around obstacles in 45°, 90°, 135° or 180° turns. The radius of the turns was either imposed or left free. We found that the head started to turn into the direction of the turn at a constant distance before the obstacle (~1.1 m) for turn angles up to 135°. During turns, the head was consistently oriented more into the direction of the turn than the trunk. This difference increased for larger turning angles and reached its maximum later in the turn for larger turns . Walking speeds decreased monotonically for increasing turn angles. Imposing fixed turn radii only affected the point at which the trunk started to turn into a turn. Our results support the view that anticipatory head movements during turns occur in order to gather advance visual information about the trajectory and potential obstacles.

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 Dates: 2008-10
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1007/s00221-008-1525-3
BibTex Citekey: 4814
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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: 191 (3) Sequence Number: - Start / End Page: 313 - 320 Identifier: ISSN: 0014-4819
CoNE: https://pure.mpg.de/cone/journals/resource/954925398496