Article

Hip and lumbar spine disorders often coexist in patients with total hip
arthroplasty (THA). The current study aimed to reveal pelvic motion pathology and
altered trunk and hip muscle recruitment patterns relating to pelvic motion in
patients with THA. Twenty-one women who underwent THA and 12 age-matched healthy
women were recruited. Pelvic kinematics and muscle recruitment patterns (i.e.,
amplitude, activity balance,
and onset timing) of the gluteus maximus,
semitendinosus, multifidus, and erector spinae were collected during prone hip
extension. Compared with healthy subjects, the patients showed increased pelvic
motion, especially ventral rotation, decreased multifidus muscle activity
relative to the hip extensors, and delayed onset of multifidus activity, despite
reaction times and speeds of leg motion not being significantly different between
the groups. Furthermore, while contributing factors associated with ventral
pelvic rotation were not found, delayed onset of multifidus activity was detected
as a factor related to the increased anterior tilt of the pelvis (r = 0.47, p <
0.05) in patients with THA.
These results suggest that patients with THA have
dysfunction of the stabilizer muscles of the lumbopelvic region along with
increased pelvic motion.
CI - Copyright (c) 2012 Elsevier Ltd. All rights reserved.

Langue : ANGLAIS