Differences in motor recruitment and resulting kinematics between low back pain patients and asymptomatic participants during lifting exertions
Differences in motor recruitment and resulting kinematics between low back pain patients and asymptomatic participants during lifting exertions
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DOI：
10.1016/j.clinbiomech.2004.08.007
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发表时间：
2004-12-01
影响因子：
1.8
通讯作者：
Gupta, P
中科院分区：
文献类型：
--
作者：
Ferguson, SA;Marras, WS;Gupta, P
背景资料。腰背部疾病是当今社会的一个普遍问题，可能会导致慢性衰弱的下腰痛。发展我们对人工搬运材料任务中的颞肌和运动学模式的理解，可能会为预防导致慢性下腰痛的一连串事件提供洞察力。62名下腰痛患者和61名无症状的参与者进行了不同的提举活动，这些活动在提举起点、水平和垂直距离、提举不对称性和重量方面各不相同。在每次运动中记录10块躯干肌肉的肌电活动以及躯干和盆腔的运动学。根据实验条件，比较下腰痛患者和无症状参与者在肌肉激活和运动学参数上的差异。与无症状的受试者相比，下腰痛患者左侧和右侧勃起棘均显著提前激活且持续时间显著延长。升降器的水平和垂直位置影响下腰痛患者和无症状患者的肌电和运动学差异。这些发现表明，与无症状的参与者相比，下腰痛患者会暴露于肌肉活动增加，导致脊柱负荷增加的时间更长。暴露在增加的脊柱负荷下的时间越长，可能会导致未来更大的下腰损伤风险，以及导致衰弱的下腰痛的级联事件。较长的肌肉激活时间表明，下腰痛患者的运动程序已经从开放系统转变为闭合系统。(C)2004爱思唯尔有限公司。保留所有权利。
Background. Low back disorders are a prevalent problem in society today and may lead to chronic debilitating low back pain. Developing our understanding of temporal muscle and kinematic patterns during manual material handling tasks may provide insight for preventing the cascading series of events leading to chronic low back pain.Methods. Sixty-two low back pain patients and 61 asymptomatic participants performed a variety of lifting exertions that varied in lift origin horizontal and vertical distance, lift asymmetry, and weight. Electromyographic activity of 10 trunk muscles as well as trunk and pelvic kinematics was recorded during each exertion. Differences in muscle activation and kinematic parameters were compared between low back pain patients and asymptomatic participants as a function of experimental conditions.Findings. Both the left and right erector spinae activated significantly earlier and were on significantly longer in low back pain patients compared to asymptomatic participants. The horizontal and vertical location of the lift influenced the EMG and kinematic differences between the low back pain patients and asymptomatic participants.Interpretation. These finding indicate that low back pain patients would be exposed to increase muscle activity resulting in higher spine loads for a greater length of time compared to asymptomatic participants. The longer exposure time to increased spine load may lead to greater risk of future low back injury and cascading events leading to debilitating low back pain. The longer muscle activation time suggests that low back pain patients have changed their motor program from an open to a closed loop system. (C) 2004 Elsevier Ltd. All rights reserved.