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Specific Neck Training Induces Sustained Corticomotor Hyperexcitability as Assessed by Motor Evoked Potentials.
MedLine Citation:
PMID:  23609207     Owner:  NLM     Status:  Publisher    
Study Design. Experimental investigation of short-term and long-term corticomotor effects of specific neck training, coordination training, and no training.Objective. To determine the effects of different training programs on the motor neurons controlling the neck muscles as well as the effects of training on muscle strength and muscle fatigue, and the correlations between corticomotor control and motor learning.Summary of Background Data. Training is usually recommended for unspecific neck pain and consists of neck and upper body coordination, strengthening, and endurance exercises. However, it is unclear which type of training is the most effective. No studies have previously investigated the neural effect of neck training and the possible differential effect of specific versus coordination training on corticomotor control.Methods. Transcranial magnetic stimulation and electromyography were used to elicit and monitor motor-evoked potentials (MEPs) from the trapezius and thumb muscles before and 30 min, 1 hour, and 7 days after training. Parameters measured were MEPs, MEP latency, strength, learning effects, and muscle fatigue.Results. Only specific neck training yielded a 65% increase in MEP up to 7 days after training compared to baseline (P < 0.001). No significant changes were seen following coordination training, no training, and in the within-subject control muscle. The mean muscle strength increased immediately after specific neck training from 56.6 to 61 kg (P < 0.001). No subjective or objective measures of fatigue were observed.Conclusion. Specific neck training induced a sustained hyperexcitability of motor neurons controlling the neck muscles compared to coordination training and controls. These findings may prove valuable in the process of developing more effective clinical training programs for unspecific neck pain.
Bjarne Rittig-Rasmussen; Helge Kasch; Anders Fuglsang-Frederiksen; Troels S Jensen; Peter Svensson
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-4-19
Journal Detail:
Title:  Spine     Volume:  -     ISSN:  1528-1159     ISO Abbreviation:  Spine     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-4-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
* Danish Pain Research Center, Aarhus University Hospital, Aarhus, Denmark †Department of Neurology, Aarhus University Hospital, Aarhus, Denmark ‡Department of Clinical Neurophysiology, Aarhus University Hospital, Aarhus, Denmark ┼Clinical Oral Physiology, Department of Dentistry, Aarhus University, Aarhus, Denmark.
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