The Effect of Transcutaneous Electrical Stimulation on Spinal Motor Neuron Excitability in People Without Known Neuromuscular Diseases: The Roles of Stimulus Intensity and Location
Open Access
- 1 April 2002
- journal article
- clinical trial
- Published by Oxford University Press (OUP) in PTJ: Physical Therapy & Rehabilitation Journal
- Vol. 82 (4) , 354-363
- https://doi.org/10.1093/ptj/82.4.354
Abstract
Background and Purpose. The Hoffmann reflex (H-reflex) is widely acknowledged as an indirect indicator of spinal motor neuron excitability. The purpose of this study was to determine whether transcutaneous electrical stimulation (TES), applied over the dorsiflexors or plantar flexors of the ankle, would alter the soleus muscle's H-reflex. Attention was focused on the roles of stimulus intensity and location. Subjects. Thirty-two volunteers without known neuromuscular diseases (17 women [53%]; mean years of age=27, SD=7.3, range=21–48) were studied. Methods. Subjects were randomly assigned to 1 of 4 groups, and TES was administered for 15 minutes. Stimulation site and intensity varied according to group assignment. H-reflexes were recorded before and for 10 minutes after TES. Results. H-reflex amplitudes increased following TES at sensory threshold, whereas H-reflex amplitudes did not change following TES at 1.5 times motor threshold. The site of stimulation did not influence the resulting H-reflexes. Discussion and Conclusion. Low-intensity TES increases H-reflex amplitudes (and presumably the excitability of spinal motor neurons to Ia afferent input) in subjects without known neuromuscular diseases. High-intensity TES had little influence on H-reflex amplitudes.Keywords
This publication has 30 references indexed in Scilit:
- Use of Neuromuscular Electrical Stimulation and a Dorsal Wrist Splint to Improve the Hand Function of a Child With Spastic HemiparesisPTJ: Physical Therapy & Rehabilitation Journal, 1997
- Long-lasting reductions of spasticity induced by skin electrical stimulationIEEE Transactions on Rehabilitation Engineering, 1996
- Therapeutic neural effects of electrical stimulationIEEE Transactions on Rehabilitation Engineering, 1996
- The Effect of Neuromuscular Electrical Stimulation in Reducing ToneAmerican Journal of Occupational Therapy, 1996
- MANAGING EQUINUS IN CHILDREN WITH CEREBRAL PALSY: ELECTRICAL STIMULATION TO STRENGTHEN THE TRICEPS SURAE MUSCLEDevelopmental Medicine and Child Neurology, 1995
- Reciprocal Ia inhibition in patients with spinal spasticityNeuroscience Letters, 1991
- The effects of neuromuscular stimulation on muscle tone at the knee in paraplegiaExperimental Physiology, 1991
- Stretch reflex inhibition using electrical stimulation in normal subjects and subjects with spasticityJournal of Biomedical Engineering, 1991
- Treatment of spinal spasticity by electrical stimulationJournal of Biomedical Engineering, 1988
- Cutaneous nerve stimulation and motoneuronal excitability: I, soleus and tibialis anterior excitability after ipsilateral and contralateral sural nerve stimulation.Journal of Neurology, Neurosurgery & Psychiatry, 1981