Latent Myofascial Trigger Points Are Associated With an Increased Intramuscular Electromyographic Activity During Synergistic Muscle Activation

Ge, Hong-You; Monterde, Sónia; Graven‐Nielsen, Thomas; Arendt-Nielsen, Lars

doi:10.1016/j.jpain.2013.10.009

Cited by 71 publications

(57 citation statements)

References 25 publications

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“…On the contrary, it seems more evident that there is increased EMG in TrPs although it poses various complications to measure this in a reliable way [27].…”

Section: Search Criteria Tth Classifications and Limitationsmentioning

confidence: 99%

Muscle Triggers as a Possible Source of Pain in a Subgroup of Tension-type Headache Patients?

Arendt-Nielsen

Castaldo

Mechelli

et al. 2016

The Clinical Journal of Pain

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Understanding the possible triggers in TTH, muscle hyperalgesia, and widespread pain sensitization, may help to develop better management regimes and possibly prevent TTH from developing into more chronic conditions. Currently, there is a striking difference between the clinical observational studies favoring the role of muscle triggers in TTH and the intervention studies generally not supporting the role of muscle triggers in TTH.

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“…On the contrary, it seems more evident that there is increased EMG in TrPs although it poses various complications to measure this in a reliable way [27].…”

Section: Search Criteria Tth Classifications and Limitationsmentioning

confidence: 99%

Muscle Triggers as a Possible Source of Pain in a Subgroup of Tension-type Headache Patients?

Arendt-Nielsen

Castaldo

Mechelli

et al. 2016

The Clinical Journal of Pain

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“…There is evidence that the presence of MTrP can cause dysfunction within the muscle it resides by altering the motor pattern, i.e., recruitment and timing of muscle activation, possibly leading to a decrease in strength [16][17][18][19]. It has also been shown that the presence of latent MTrP can cause an increase in intramuscular EMG activity and alter the synergistic muscle firing pattern during movement [20]. These studies do not however help explain our observations, which imply that MTrPs can affect muscles in which they do not reside.…”

Section: Discussionmentioning

confidence: 99%

Clinical Measures Predicting Knee Extensor Muscle Activation During a Maximal Voluntary Isometric Contraction

Morelli¹,

Garcia²,

Brown³

et al. 2015

JESO

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Open Access Research Articlefiber pennation angle) but also by its neurophysiological properties (e.g., motor unit recruitment, rate coding, motor unit synchronization). Several studies have shown that the deficits in knee extensor strength found after knee injuries are attributable more to decreased knee extensor muscle activation than to muscle atrophy due to disuse [1][2][3]. The inability to maximally activate the knee extensors in the absence of frank tissue damage can alter athletic performance, which often relies on optimal contraction of this lower-extremity muscle group [1].The interpolated twitch and central activation ratio methods are considered to reliably assess the percent of a muscle group's mass that is activated during a voluntary contraction [4,5]. Interestingly, the knee extensors have, on average, been observed to have a relatively low activation during a maximal voluntary isometric contraction (MVIC) compared to other muscles or muscle groups, including the biceps, brachialis, adductor pollicis, tibialis anterior, and ankle plantarflexors [5]. Activation of the knee extensor during a MVIC in otherwise healthy individuals has been reported on average to be in the 85-95% range, while the MVIC activation for other muscle groups exceeds 95%. We have reported a similar mean value for the knee extensors (i.e., 86%) in apparently healthy young adults but individual values in the study ranged greatly from 64 to 99% [6]. The lower knee extensor activation levels observed in healthy individuals may not affect typical activities of daily living, but they could limit athletic performance and/or affect injury prevention.Knowing knee extensor activation during a MVIC could be useful clinical data for optimizing athletic performance, determining an athlete's ability to return to sport, and design of strengthening and rehabilitation programs. While it is possible to assess activation by performing the interpolated twitch and central activation ratio methods in the research laboratory, the techniques are not practical to perform in a clinical setting or on the training field because they require expertise and training not possessed by most clinicians, and utilize equipment not commonly found in the clinic. Also, the techniques are often AbstractStrength of a muscle group is determined by its physiological cross-sectional area and one's ability to activate the muscle group. Injury and disuse are associated with a decreased ability to maximally activate a muscle group. Clinical orthopedic measures such as manual muscle testing may provide an indication of muscle strength but no direct insight into the extent a muscle group is being activated. The objective of our studies was to determine the standard clinical orthopedic measures and/or medical history that can best predict muscle activation during a maximal voluntary isometric contraction (MVIC) of the knee extensors. Forty young, healthy subjects completed a pilot study (Study A), which included a medical history assessment and a comprehensive battery of low...

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“…Another issue is the occurrence of end plate activity inside and outside TrPs. Some studies reported end plate activity in every TrP and total absence of such activity in the control points [43,44]. However, it was showed, that the difference between TrPs and control points, as to the number of EPSs, may even be non-significant [45].…”

Section: Trigger Points Taut Bands and Pain Spotsmentioning

confidence: 99%

Muscle Pain and Muscle Spindles

Partanen¹

2018

Anatomy, Posture, Prevalence, Pain, Treatment and Interventions of Musculoskeletal Disorders

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Latent Myofascial Trigger Points Are Associated With an Increased Intramuscular Electromyographic Activity During Synergistic Muscle Activation

Cited by 71 publications

References 25 publications

Muscle Triggers as a Possible Source of Pain in a Subgroup of Tension-type Headache Patients?

Muscle Triggers as a Possible Source of Pain in a Subgroup of Tension-type Headache Patients?

Clinical Measures Predicting Knee Extensor Muscle Activation During a Maximal Voluntary Isometric Contraction

Muscle Pain and Muscle Spindles

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