Document Detail

A proposed experimental model of myofascial trigger points in human muscle after slow eccentric exercise.
MedLine Citation:
PMID:  15077932     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The purpose of this study was to develop an experimental model of myofascial trigger points to investigate their pathophysiology. METHODS: Fifteen healthy volunteers who gave informed consent underwent repetitive eccentric exercise of the third finger of one hand (0.1 Hz repetitions, three sets at five minute intervals) until exhaustion. Physical examination, pressure pain threshold, and electrical pain threshold of the skin, fascia and muscle were measured immediately afterwards and for seven days. Needle electromyogram (EMG) was also recorded in a subgroup of participants. RESULTS: Pressure pain thresholds decreased to a minimum on the second day after the exercise, then gradually returned to baseline values by the seventh day. On the second day, a ropy band was palpated in the exercised forearm muscle and the electrical pain threshold of the fascia at the palpable band was the lowest among the measured loci and tissues. Needle EMG activity accompanied with dull pain sensation was recorded only when the electrode was located on or near the fascia of the palpable band on the second day of exercise. CONCLUSION: These results suggest that eccentric exercise may yield a useful model for the investigation of the myofascial trigger points and/or acupuncture points. The sensitised nociceptors at the fascia of the palpable band might be a possible candidate for the localised tender region.
Kazunori Itoh; Kaoru Okada; Kenji Kawakita
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acupuncture in medicine : journal of the British Medical Acupuncture Society     Volume:  22     ISSN:  0964-5284     ISO Abbreviation:  Acupunct Med     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-04-13     Completed Date:  2004-06-18     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9304117     Medline TA:  Acupunct Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  2-12; discussion 12-3     Citation Subset:  IM    
Meiji University of Oriental Medicine, Kyoto, Japan.
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MeSH Terms
Electric Stimulation* / methods
Exercise / physiology*
Fascia / physiology
Fingers* / innervation
Middle Aged
Muscle Contraction* / physiology
Muscle, Skeletal / physiology
Myofascial Pain Syndromes / physiopathology*
Pain / etiology
Pain Threshold
Physical Exertion* / physiology
Reference Values
Sensitivity and Specificity
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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