Article

The objective of this study was to assess the magnitude of quadriceps activation
deficits in the involved extremity and contralateral extremity of patients with
knee joint osteoarthritis (OA),
as well as matched controls.
An exhaustive search
of the literature was performed using Web of Science between 1970 and February
24, 2010, using the search terms "osteoarthritis" AND "quadriceps activation" OR
"quadriceps inhibition" and cross-referencing pertinent articles. Studies written
in English reporting quadriceps activation means and standard deviations in
patients with tibiofemoral OA via a method using an exogenous electrical
stimulation were evaluated for methodological quality and were included for data
analysis. Fourteen individual studies met the criteria for inclusion into data
analysis. The number of participants and mean activation levels were used to
calculate weighted means for the involved limb (14 studies), the contralateral
limb (from a subset of 6 studies), and an involved limb subset from only the
studies evaluating the contralateral limb and population of control subjects (5
studies). Weighted means from the involved limb (82.2; 95% CI = 81.4-83.3%),
contralateral limb (81.7; 80.1-83.3%), and involved limb subset (76.8;
74.8-78.8%) groups were found to have lower volitional quadriceps activation
compared with the control groups (90; 88.9-91.7%). Although the weighted involved
limb mean was not different from that of the contralateral limb, the mean and 95%
confidence intervals for the involved limb subset were lower than that of the
contralateral limb group, suggesting that the involved limb had less volitional
activation within OA subjects. This provides evidence that bilateral quadriceps
volitional activation deficits are present in persons with knee OA.
CI - Copyright (c) 2011 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS