Postural reorientation does not cause the locomotor after-effect following rotary locomotion
Affiliation
University of Birmingham, School of Sport and Exercise Sciences, College of Life and Environmental SciencesIssue Date
2012
Metadata
Show full item recordAbstract
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.Citation
Postural reorientation does not cause the locomotor after-effect following rotary locomotion 2012, 220 (3-4):231 Experimental Brain ResearchPublisher
SpringerJournal
Experimental Brain ResearchDOI
10.1007/s00221-012-3132-6Additional Links
http://link.springer.com/10.1007/s00221-012-3132-6Type
Research ReportLanguage
enISSN
0014-48191432-1106
ae974a485f413a2113503eed53cd6c53
10.1007/s00221-012-3132-6