Trigger Points were first researched and comprehensively mapped out by Drs. Janet Travel and David Simons. Their seminal 2-volume work <"Myofascial Pain and Dysfunction" The Trigger Point Manual is the standard in the field. In it they describe the clinical characteristics of trigger points as: “…a hyperirritable locus within a taut band of skeletal muscle, located in the muscular tissue and/or its associated fascia. The spot is painful on compression and can evoke characteristic referred pain and autonomic phenomena.”
The books are in-depth medical resources but are worth the time to leaf through for any interested layperson. The language is quit readable and the illustrations are exceptional. I would recommend reviewing them at a local medical library, as they are quite expensive.
There are many other less authoritative books and manuals on the subject that can be found in most libraries and bookstores.
Finished with Trigger Points, return to Neuromuscular Therapy
Types of Pain.