Back of Body:  *
Trigger points are described as hyperirritable spots in skeletal muscle
that are associated with palpable nodules in taut bands of muscle
fibers. Trigger point researchers believe that palpable nodules are
small contraction knots and a common cause of pain. Compression of a
trigger point may elicit local tenderness, referred pain, or local
twitch response. The local twitch response is not the same as a muscle
spasm. This is because a muscle spasm refers to the entire muscle
entirely contracting whereas the local twitch response also refers to
the entire muscle but only involves a small twitch, no contraction.
The
trigger point model states that unexplained pain frequently radiates
from these points of local tenderness to broader areas, sometimes
distant from the trigger point itself. Practitioners claim to have
identified reliable referred pain patterns, allowing practitioners to
associate pain in one location with trigger points elsewhere. Many
chiropractors and massage therapists find the model useful in practice,
but the medical community at large has not embraced trigger point
therapy. Although trigger points do appear to be an observable
phenomenon with defined properties, there is a lack of a consistent
methodology for diagnosing trigger points and a dearth of theory
explaining how trigger points arise and why they produce specific
referred pain patterns.
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