Spontaneous Needle Electromyographic Activity in Myofascial Trigger Points in the Infraspinatus Muscle: A Blinded Assessment

Couppé, Christian; Midttun, Asbjørn; Hilden, Jørgen; Jørgensen, U. G.; Oxholm, P; Fuglsang‐Frederiksen, Anders

doi:10.1300/j094v09n03_02

Cited by 93 publications

(48 citation statements)

References 20 publications

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“…68 Endplate dysfunction has been confirmed by multiple animal model and human studies. 55,[71][72][73][74][75][76][77][78][79] Kuan and colleagues found a correlation between the irritability of trigger points and the prevalence of endplate noise, 39 and confirmed that blocking the release of acetylcholine with administration of botulinum toxin reduced the prevalence of endplate noise. 80 Several other studies have also shown that the administration of botulinum toxin can reduce the activity of trigger points.…”

mentioning

confidence: 99%

Dry needling — peripheral and central considerations

Dommerholt¹

2011

Journal of Manual & Manipulative Therapy

220

140

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Dry needling is a common treatment technique in orthopedic manual physical therapy. Although various dry needling approaches exist, the more common and best supported approach targets myofascial trigger points. This article aims to place trigger point dry needling within the context of pain sciences. From a pain science perspective, trigger points are constant sources of peripheral nociceptive input leading to peripheral and central sensitization. Dry needling cannot only reverse some aspects of central sensitization, it reduces local and referred pain, improves range of motion and muscle activation pattern, and alters the chemical environment of trigger points. Trigger point dry needling should be based on a thorough understanding of the scientific background of trigger points, the differences and similarities between active and latent trigger points, motor adaptation, and central sensitize application. Several outcome studies are included, as well as comments on dry needling and acupuncture.

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confidence: 99%

Dry needling — peripheral and central considerations

Dommerholt¹

2011

Journal of Manual & Manipulative Therapy

220

140

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“…There is no sustained spontaneous activation of motor unit potentials (MUPs) (spasticity) or any signs of denervation i.e. fibrillation potentials or motor unit potential alterations typical for nerve sprouting (Couppé et al, 2001). …”

Section: Electromyography Of Trigger Pointsmentioning

confidence: 99%

“…TrPs show more numerous local findings of spontaneous electrical activity (SEA) than control points (Couppé et al, 2001). SEA may consist of endplate activity which is reflected in two forms, often activated together: endplate noise (EPN) (miniature end plate potentials MEPPs) and end plate spikes (EPS).…”

Section: Spontaneous Electrical Activity At the Endplatementioning

confidence: 99%

Electromyography in Myofascial Syndrome

Partanen¹

2012

EMG Methods for Evaluating Muscle and Nerve Function

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“…The potentials observed at trigger points appeared to be similar to the potentials identified at the motor endplate regions. Subsequently, in a blinded study, Couppe et al 9 found spontaneous electrical activity significantly more often at trigger points than at control points, and interpreted this activity as motor endplate noise or motor endplate spikes, or both.Abbreviations: EMG, electromyography; HMT, high mechanical threshold; LMT, low mechanical threshold; PPDT, pressure pain detection threshold; SFMPQ, short form of McGill Pain Questionnaire; VAS, visual analogue scale; VR1, vanilloid receptor 1 …”

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confidence: 99%

Evoked pain in the motor endplate region of the brachial biceps muscle: An experimental study

et al. 2004

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Spontaneous electrical activity, interpreted as motor endplate activity, has been reported at muscle trigger points. This study examined whether the motor endplate region, identified by electromyography, is more sensitive to noxious stimuli than other muscle sites. We induced pain in the brachial biceps muscles of 21 healthy subjects by injecting capsaicin (30 microg/0.1 ml) and NaCl (5%/0.2 ml) in the motor endplate region and at electrically silent muscle sites. Needle and evoked pain were measured by a visual analogue scale (VAS) (0-10) and the short form of the McGill Pain Questionnaire. The needle pain in the motor endplate region differed both in intensity and quality from that at other sites. The maximal pain after NaCl 5% was higher, and the VAS area-under-the-curve for NaCl 5% and capsaicin were larger, in the motor endplate region than in other sites. A higher density of muscle nociceptors in the vicinity of the motor endplate region may account for the observed differences in pain. These findings may have clinical implications for the treatment of musculoskeletal pain conditions.

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Spontaneous Needle Electromyographic Activity in Myofascial Trigger Points in the Infraspinatus Muscle: A Blinded Assessment

Cited by 93 publications

References 20 publications

Dry needling — peripheral and central considerations

Dry needling — peripheral and central considerations

Electromyography in Myofascial Syndrome

Evoked pain in the motor endplate region of the brachial biceps muscle: An experimental study

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