Rule for Scaling Shoulder Rotation Angles while Walking through Apertures
Identifieur interne : 002232 ( Pmc/Corpus ); précédent : 002231; suivant : 002233Rule for Scaling Shoulder Rotation Angles while Walking through Apertures
Auteurs : Takahiro Higuchi ; Yasuhiro Seya ; Kuniyasu ImanakaSource :
- PLoS ONE [ 1932-6203 ] ; 2012.
Abstract
When an individual is trying to fit into a narrow aperture, the amplitude of shoulder rotations in the yaw dimension is well proportioned to the relative aperture width
Eight young participants walked through narrow apertures of three widths (ratio value = 0.9, 1.0, and 1.1) while holding one of three horizontal bars (short, 1.5 and 2.5 times the body width). The results showed that the amplitude of rotation angles became smaller for the respective ratio value as the bar increased in length. This was clearly inconsistent with the general hypothesis that predicted the same rotation angles for the same ratio value. Instead, the results were better explained with a new hypothesis which predicted that a smaller rotation angle was sufficient to produce a constant spatial margin as the bar-length increased in length.
The results show that, at least under safe circumstances, the CNS is likely to determine the amplitudes of shoulder rotations to ensure the minimal spatial margin being created at one side of the body at the time of crossing. This was new in that the aperture width subtracted from the width of the body (plus object) was taken into account for the visuomotor control of locomotion through apertures.
Url:
DOI: 10.1371/journal.pone.0048123
PubMed: 23144736
PubMed Central: 3483222
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