Facilitation of triceps brachii muscle contraction by tendon vibration after chronic cervical spinal cord injury

被引:33
作者
Ribot-Ciscar, E
Butler, JE
Thomas, CK
机构
[1] Fac Sci & Tech St Jerome, Lab Neurobiol Humaine, UMR CNRS 6149, F-13397 Marseille, France
[2] Prince Wales Med Res Inst, Randwick, NSW 2031, Australia
[3] Univ Miami, Sch Med, Miami Project Cure Paralysis, Miami, FL 33136 USA
关键词
tonic vibration reflex; antagonist vibratory response; muscle weakness; muscle paralysis; maximum voluntary contraction;
D O I
10.1152/japplphysiol.00894.2002
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
One way to improve the weak triceps brachii voluntary forces of people with chronic cervical spinal cord injury may be to excite the paralyzed or submaximally activated fraction of muscle. Here we examined whether elbow extensor force was enhanced by vibration ( 80 Hz) of the triceps or biceps brachii tendons at rest and during maximum isometric voluntary contractions (MVCs) of the elbow extensors performed by spinal cord-injured subjects. The mean +/- SE elbow extensor MVC force was 22 +/- 17.5 N (range: 0 - 23% control force, n = 11 muscles). Supramaximal radial nerve stimuli delivered during elbow extensor MVCs evoked force in six muscles that could be stimulated selectively, suggesting potential for force improvement. Biceps vibration at rest always evoked a tonic vibration reflex in biceps, but extension force did not improve with biceps vibration during triceps MVCs. Triceps vibration induced a tonic vibration reflex at rest in one-half of the triceps muscles tested. Elbow extensor MVC force ( when >1% of control force) was enhanced by vibration of the triceps tendon in one-half of the muscles. Thus triceps, but not biceps, brachii tendon vibration increases the contraction strength of some partially paralyzed triceps brachii muscles.
引用
收藏
页码:2358 / 2367
页数:10
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