Article

The effect of alterations in the processing of proprioceptive signals, on
postural control, has been studied using muscle vibration effects. However,
reliability and agreement of muscle vibration have still to be addressed. This
study aimed to assess intra- and interday reliability and agreement of vibration
effects of lumbar paraspinal and triceps surae muscles in a non-selected sample
of 20 subjects, standing on solid surface and on foam. We used mean position and
velocity of Centre of Pressure (CoP), during and after vibration to quantify the
effect of muscle vibration. We also calculated the ratio of vibration effects on
the lumbar paraspinal and triceps surae muscles (proprioceptive weighting).
Displacement of the CoP during vibration showed good reliability (ICCs>0.6), and
proprioceptive weighting of displacement fair to good reliability (0.52-0.73).
Agreement measures were poor, with most CV's ranging between 18% and 36%. Change
in CoP velocity appeared not to be reliable. Balance recovery, when based on CoP
position and calculated a short period after cessation of vibration, showed good
reliability. According to this study, displacement during vibration,
proprioceptive weighting and selected recovery variables are the most reliable
indicators of the response to muscle vibration.
CI - Copyright (c) 2014 Elsevier B.V. All rights reserved.

Langue : ANGLAIS