Postural reorientation does not cause the locomotor after-effect following rotary locomotion

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Osler, Callum J. and Reynolds, Raymond Francis 2012. Postural reorientation does not cause the locomotor after-effect following rotary locomotion. Springer. https://doi.org/10.1007/s00221-012-3132-6
AuthorsOsler, Callum J. and Reynolds, Raymond Francis
Abstract

After a period of stepping on a rotating platform, blindfolded subjects demonstrate a tendency to unconsciously turn when stepping in place, an after-effect known as podokinetic after-rotation (PKAR). Recent studies have also reported a change in postural orientation following the adaptive period and have suggested that this is causally related to PKAR. Here, we assess changes in trunk orientation following platform adaptation and determine their relationship to PKAR. Specifically, we determine whether a reorganized standing posture causes PKAR. Ten subjects stepped on a platform rotating at 60deg/s for 10 min, with a cadence of 100 steps/min. Following adaptation, a significant PKAR response was seen, with a mean yaw rotation velocity of 6.0 ± 2.2deg/s. In addition to this dynamic after-effect, there was a significant twist of the trunk with respect to the feet when standing still (6.9 ± 4.5deg; mean ± SD), confirming the presence of a postural reorientation after-effect. However, the magnitudes of the two after-effects did not correlate (r = 0.06, p = 0.87). Furthermore, in a second experiment, a prolonged passive twist of the trunk was used to induce postural reorientation. However, in this case, PKAR was not induced. These results demonstrate that PKAR is not an automatic consequence of reorganized standing posture.

KeywordsAdaptation; After-effect; Body orientation; Locomotion; Posture
Year2012
PublisherSpringer
ISSN0014-4819
1432-1106
Digital Object Identifier (DOI)https://doi.org/10.1007/s00221-012-3132-6
Web address (URL)http://hdl.handle.net/10545/304847
hdl:10545/304847
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Publication dates2012
Publication process dates
Deposited31 Oct 2013, 18:57
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Archived with thanks to Experimental Brain Research

ContributorsUniversity of Birmingham, School of Sport and Exercise Sciences, College of Life and Environmental Sciences
JournalExperimental Brain Research
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https://repository.derby.ac.uk/item/947qv/postural-reorientation-does-not-cause-the-locomotor-after-effect-following-rotary-locomotion

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