The Effect of Fatigue on Flexion or Extension of Cervical Region in Participants with Myofascial Trigger Point in Upper Trapezius Muscle

Abstract

Myofascial Pain Syndrome (MPS) is one of the most frequent causes of muscle pain. MPS is characterized by the presence of a myofascial trigger point (MTrP), defined as a hypersensitive spot in a taut band of a skeletal muscle that is painful to stimulation (compression, or needling), elicits a referred pain distant to the spot, and is associated with restricted range of motion. The purpose of this study was to assess the correlation between fatigue over a myofascial trigger point in the upper trapezius muscle and range of motion of the cervical spine, electromyographic activity, and pain in patients with myofascial trigger point. Methods: This is a single-blind cross-sectional study. Forty participants of both sexes, aged 18 to 35 years, with chronic neck pain and myofascial trigger points in the upper trapezius muscle were included in the study. The participants were assessed using the Numeric Rating Scale, algometry and electromyographic activity. Results: Improvement in flexion range of motion was found to be greater in interventional group compared to the control group( p<0.05). Conclusion: Fatigue applied to the interventional group can reduce pain and disability, and increase ROM in individuals with MTrP. This treatment may therefore be considered for use as an alternative method in treating MTrP.