Muscle velocity recovery cycles: Effects of repetitive stimulation on two muscles

被引：26
|
作者：
Boerio, Delphine [1 ,2 ]
Z'Graggen, Werner J. [1 ,2 ,3 ]
Tan, S. Veronica [4 ,5 ]
Guetg, Andri [1 ,2 ]
Ackermann, Karin [1 ,2 ]
Bostock, Hugh [1 ,2 ,4 ,6 ]
机构：
[1] Univ Hosp Bern, Inselspital, Dept Neurol, CH-3010 Bern, Switzerland
[2] Univ Bern, Bern, Switzerland
[3] Univ Hosp Bern, Inselspital, Dept Neurosurg, CH-3010 Bern, Switzerland
[4] Natl Hosp Neurol & Neurosurg, MRC, Ctr Neuromuscular Dis, London WC1N 3BG, England
[5] Guys & St Thomas NHS Fdn Trust, Dept Neurol & Neurophysiol, London SE7 1EH, England
[6] UCL, Inst Neurol, Sobell Dept Motor Neurosci & Movement Disorders, London WC1N 3BG, England
来源：
MUSCLE & NERVE | 2012年 / 46卷 / 01期
基金：
瑞士国家科学基金会;
关键词：
brachioradialis muscle; muscle fatigue; muscle membrane potential; muscle velocity recovery cycle; tibialis anterior muscle; CRITICAL ILLNESS MYOPATHY; ACTION-POTENTIALS; SKELETAL-MUSCLE; AXONAL EXCITABILITY; EXERCISE TEST; HUMANS; CHANNELOPATHIES; FIBERS;
D O I：
10.1002/mus.23267
中图分类号：
R74 [神经病学与精神病学];
学科分类号：
摘要：
Introduction: We sought to characterize the excitability properties of tibialis anterior (TA) and brachioradialis (BR) muscles at rest and during electrically induced muscle activation in normal subjects. Methods: Two centers recruited 10 subjects each. Multi-fiber velocity recovery cycles (VRCs) were recorded from TA (both centers) and BR (one center). VRCs were assessed at rest and during repetitive stimulation (intermittent 20 Hz for 6 min). Changes in latency and peak amplitude of the muscle action potential induced by a frequency ramp to 30 Hz were also characterized. Results: Excitability properties recorded from TA were very similar between centers. Repetitive stimulation generated marked excitability changes, which were similar between TA and BR. Conclusions: Standardized tests of muscle VRCs and responses to repetitive stimulation can provide consistent measures of membrane function and may encourage their wider use in clinical neurophysiology to investigate the pathophysiology of neuromuscular disorders. Muscle Nerve 46: 102111, 2012
引用
收藏
页码：102 / 111
页数：10
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