Muscle velocity recovery cycles: Effects of repetitive stimulation on two muscles
Article first published online: 29 MAY 2012
Copyright © 2012 Wiley Periodicals, Inc.
Muscle & Nerve
Volume 46, Issue 1, pages 102–111, July 2012
How to Cite
BoËRio, D., Z'graggen, W. J., Tan, S. V., Guetg, A., Ackermann, K. and Bostock, H. (2012), Muscle velocity recovery cycles: Effects of repetitive stimulation on two muscles. Muscle Nerve, 46: 102–111. doi: 10.1002/mus.23267
- Issue published online: 12 JUN 2012
- Article first published online: 29 MAY 2012
- Accepted manuscript online: 5 DEC 2011 06:28AM EST
- Manuscript Accepted: 1 DEC 2011
- brachioradialis muscle;
- muscle fatigue;
- muscle membrane potential;
- muscle velocity recovery cycle;
- tibialis anterior muscle
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.
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.
Excitability properties recorded from TA were very similar between centers. Repetitive stimulation generated marked excitability changes, which were similar between TA and BR.
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: 102–111, 2012