Trunk motor variability in patients with non-specific chronic low back pain

被引:67
作者
Abboud, Jacques [1 ]
Nougarou, Francois [2 ]
Page, Isabelle [2 ]
Cantin, Vincent [2 ]
Massicotte, Daniel [3 ]
Descarreaux, Martin [2 ]
机构
[1] Univ Quebec Trois Rivieres, Dept Anat, Trois Rivieres, PQ G9A 5R7, Canada
[2] Univ Quebec Trois Rivieres, Dept Sci Activite Phys, Trois Rivieres, PQ G9A 5R7, Canada
[3] Univ Quebec Trois Rivieres, Dept Genie Elect, Trois Rivieres, PQ G9A 5R7, Canada
关键词
Motor variability; Surface electromyography; Low back pain; Muscle fatigue; MOVEMENT VARIABILITY; MUSCLE; CONTRACTIONS; PERFORMANCE; ADAPTATIONS; ADULTS; TASK; TIME;
D O I
10.1007/s00421-014-2985-8
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
To identify and characterize trunk neuromuscular adaptations during muscle fatigue in patients with chronic low back pain (LBP) and healthy participants. Forty-six patients with non-specific chronic LBP and 23 healthy controls were asked to perform a trunk muscles fatigue protocol. Surface electromyography was recorded using two adhesive matrix of 64 electrodes applied bilaterally over the erector spinae. Pain score, kinesiophobia and physical disability were analyzed through different questionnaires. To characterize motor variability, dispersion of muscular activity center of gravity was computed. Motor variability between groups was compared using repeated-measures analyses of variance. Score of disability and kinesiophobia were significantly higher in patients with LBP. Results indicated a significant group effect characterized by an increased motor variability in the healthy group through the entire fatigue task on the left (p = 0.003) and right side (p = 0.048). Interestingly, increasing muscle fatigue led to increased motor variability in both groups (on both sides (p < 0.001) but with a greater increase in the healthy group. Muscle recruitment is altered in patients with chronic LBP in the presence of muscle fatigue. Consequently, these patients exhibit changes in muscle recruitment pattern and intensity (lower levels of motor variability) during sustained isometric contraction that may be attributed to variation in the control of motor units within and between muscles. However, patients with LBP are able to increase their motor variability over time but with a lower increase compared to healthy participants.
引用
收藏
页码:2645 / 2654
页数:10
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