Background: Myofascial trigger points (MTrPs) are hyperirritable spots located in taut bands of muscle fibres. Electrophysiological studies indicate that abnormal electrical activity is detectable ...

A trigger point in a muscle will cause pain in the area. In the upper back, it may cause pain across the group of muscles around the spine, neck, and shoulders. Treatment can include laser therapy ...

Active trigger points cause pain in the area where ... (The upper section of the trapezius muscle is located on the back of the neck and top of the shoulder.) The trapezius muscle now may be ...