Journal Article10.1097/00007632-199310000-00015
Myofascial trigger points show spontaneous needle EMG activity.
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TL;DR: The authors hypothesize that TrPs are caused by sympathetically activated intrafusal contractions.
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Abstract: Monopolar needle electromyogram (EMG) was recorded simultaneously from trapezius myofascial trigger points (TrPs) and adjacent nontender fibers (non-TrPs) of the same muscle in normal subjects and in two patient groups, tension headache and fibromyalgia. Sustained spontaneous EMG activity was found in the 1-2 mm nidus of all TrPs, and was absent in non-TrPs. Mean EMG amplitude in the patient groups was significantly greater than in normals. The authors hypothesize that TrPs are caused by sympathetically activated intrafusal contractions.
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Citations
Myofascial Pelvic Pain: Best Orientation and Clinical Practice. Position of the European Association of Urology Guidelines Panel on Chronic Pelvic Pain.
Pedro Abreu-Mendes,Andrew P. Baranowski,Bary Berghmans,Jan Borovicka,Angela M. Cottrell,Paulo Dinis-Oliveira,Sohier Elneil,John Hughes,Bert Messelink,Victoria Tidman,Rui Pinto,Jure Tornic,Ida K. Flink,Brian A. Parsons,Valentin Zumstein,Daniel S. Engeler +15 more
TL;DR: In this article , the authors present the current state of the art for the management of myofascial pain in chronic primary pelvic pain syndromes (CPPPS) according to scientific research and input from experts from the European Association of Urology (EAU) guidelines panel on CPP.
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Intensive short-term vasodilation effect in the pain area of sciatica patients--case study.
TL;DR: For the first time, intensive short-term vasodilation in the pain area following needle infiltration of the gluteus minimus trigger point was recorded and confirmed the existence of a link between the pain of sciatica patients (radicular or Sciatica-like pain) and the activity of the autonomic nervous system.
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Spontaneous electrical activity at combined acupuncture and myofascial trigger point sites
TL;DR: Small, localised areas of spontaneous electrical activity were found at combined acupuncture and myofascial trigger point sites, corresponding to Gall Bladder 21 in the Trapezius and Small Intestine 11 in the Infraspinatus, in patients with active my ofascial neck and shoulder pain.
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Relationship between muscle spindles and myofascial trigger spots according to Hoffmann reflex pathway and tissue morphology characteristics in a rat model
TL;DR: Compared with normal muscles, the H-reflex myoelectrical activity was enhanced and some muscle spindles might have been influenced by active MTrSs, which may play an important role in the pathological mechanism underlying myofascial trigger points.
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No Increased Neuromuscular Jitter at Rabbit Skeletal Muscle Trigger Spot Spontaneous Electrical Activity Sites
TL;DR: It appears that the neuromuscular transmission of end-plate in MTrS in rabbits is not impaired based on this SFEMG study using jitter as the sole criteria, and spontaneous electrical activity is not related to neuromoscular transmission abnormality.
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