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Pain patterns and mandibular dysfunction following experimental trapezius muscle pain
Osamu Komiyama1, Maki Arai, Misao Kawara
1Department of Oral and Maxillofacial Surgery, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Catholic University of Leuven, Leuven, Belgium.
Journal of Orofacial Pain
|May 18, 2005
Summary
Experimental trapezius muscle pain can spread widely and temporarily reduce mouth opening. This study investigated pain spread and jaw motor function following induced trapezius pain.
Area of Science:
- Pain research
- Neurology
- Musculoskeletal system
Background:
- Trapezius muscle pain is common.
- Its effects on pain spread and jaw function are not fully understood.
Purpose of the Study:
- To investigate the effects of experimental trapezius muscle pain.
- To assess pain spread and jaw motor function.
Main Methods:
- 12 healthy males received hypertonic saline injections into the trapezius muscle.
- Pain intensity was measured using a visual analog scale (VAS).
- Jaw opening and pain spread were recorded.
Main Results:
- Induced trapezius pain significantly increased VAS scores and reduced mouth opening.
- Pain spread to the infra-auricular zone and posterolateral neck.
- Effects were significant compared to isotonic saline control.
Conclusions:
- Experimental trapezius muscle pain can cause widespread pain referral.
- It leads to a temporary decrease in maximal mouth opening.
