Anterior trigger points associated with the myofascial pain syndrome

Palpation of a trigger point (black dots) in patients with the myofascial pain syndrome may cause pain at a distant point. This zone of reference (gray area) is usually quite characteristic for each trigger point.

Reproduced with permission from Sheon, RP, Moskowitz, RW, Goldberg, VM. Soft Tissue Rheumatic Pain: Recognition, Management, Prevention, 3rd ed, Williams & Wilkins, Baltimore 1996.

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