Article

OBJECTIVE: To evaluate the core muscles' electromyographic activity in response
to unexpected perturbations to the pelvis in patients with patellofemoral pain
syndrome (PFPS) and healthy subjects. DESIGN: Case-control study. SETTING: Center
for human motion science research. PARTICIPANTS: Women (N=54) aged 18 to 40
years, including 27 subjects with diagnosed PFPS and 27 healthy controls.
INTERVENTION: An unexpected perturbation was applied to the lateral side of the
pelvis by pulling a 1kg medicine ball back to an angle in which releasing the
pendulum applied the energy of 20% of the subject's body mass index. This
intervention was repeated 3 times with a minimum of 30 seconds of rest between
the trials. MAIN OUTCOME MEASURES: Electromyographic onsets and durations of the
transversus abdominis/internal oblique, erector spinae (ES), and gluteus medius
(GM) muscles were recorded in response to the unexpected lateral perturbation to
the pelvis. RESULTS: The recruitment pattern of the core muscles was different
between the 2 groups. In the subjects with PFPS, the abdominal muscles and the ES
activated significantly earlier and longer, whereas the GM responded
significantly later than in the controls. The duration of GM activity was not
significantly different between the groups. CONCLUSIONS: The results of this
investigation suggest that the core muscles are recruited differently in subjects
with PFPS to provide core stability. It appears that core neuromuscular
improvement could be an effective strategy in rehabilitation of patients with
PFPS.
CI - Copyright (c) 2014 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS