INCREASED CENTRAL DRIVE DURING FATIGUING CONTRACTIONS OF THE PARASPINAL MUSCLES IN PATIENTS WITH CHRONIC LOW-BACK-PAIN

被引：22

作者：

COOPER, RG

STOKES, MJ

SWEET, C

TAYLOR, RJ

JAYSON, MIV

机构：

[1] Pinderfield’s General Hospital, Wakefield, West Yorkshire

[2] Royal Hospital and Home, London, Putney

[3] Rheumatic Diseases Centre, University of Manchester

[4] Medical Physics Department, Hope Hospital

来源：

SPINE | 1993年 / 18卷 / 05期

基金：

英国惠康基金;

关键词：

Back pain; Electromyography; Fatigue; Paraspinal muscle;

D O I：

10.1097/00007632-199304000-00014

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

In low back pain patients the paraspinal muscles demonstrate excess fatigability. Whether the cause is ''central' as could result from impaired motor unit recruitment due to poor motivation or fear of pain, or ''peripheral'', and caused by defects in the contractile apparatus, is unknown. Using surface electromyography in conjunction with a standardized isometric fatigue test, this study investigates the mechanisms causing paraspinal muscle dysfunction in patients with both nonsurgical and postsurgical chronic low back pain. During the fatigue test normal subjects and both patient groups exhibited electromyographic increases. These were significantly greater in both patient groups, indicating increased central drive to their muscles. These findings may suggest that patients' excess fatigue is peripheral in origin, with increased central drive arising secondary to muscle wasting or denervation, although a central activation defect has not been excluded. Impaired physical performance in low back pain patients does not seem to be caused by lack of central drive.

引用

页码：610 / 616

页数：7

共 45 条

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