Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
J Electromyogr Kinesiol. 2013 Feb;23(1):151-8. doi: 10.1016/j.jelekin.2012.08.005. Epub 2012 Sep 1.
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.
髋关节和腰椎疾病在全髋关节置换术（THA）患者中常常同时存在。本研究旨在揭示与骨盆运动相关的骨盆运动病理学以及与骨盆运动相关的躯干和臀部肌肉募集模式的改变。共招募了 21 名接受 THA 的女性患者和 12 名年龄匹配的健康女性。在俯卧位髋关节伸展时，收集了臀大肌、半腱肌、多裂肌和竖脊肌的骨盆运动和肌肉募集模式（即幅度、活动平衡和起始时间）。与健康受试者相比，患者表现出增加的骨盆运动，特别是腹侧旋转，与髋伸肌相比，多裂肌的肌肉活动减少，并且多裂肌的活动起始延迟，尽管两组之间腿部运动的反应时间和速度没有显著差异。此外，尽管没有发现与腹侧骨盆旋转相关的因素，但多裂肌活动的延迟起始被检测为与 THA 患者骨盆前倾增加相关的因素（r = 0.47，p < 0.05）。这些结果表明，THA 患者的腰骶区稳定肌功能障碍，同时骨盆运动增加。
