Trigger Points In Muscles Research Articles

Current advances in the treatment of myofascial pain syndrome with trigger point injections: A review.

Myofascial pain syndrome (MPS) caused by trigger points in muscles is a common cause of local or generalized pain, which is clinically common, has a high incidence, and has no specific cure. The most popular and widely used clinical method mainly targets the trigger point for treatment, i.e. trigger point injection (TPI) therapy. The injectable drugs mainly include glucose, saline, local anesthetics, botulinum toxin type A, platelet-rich plasma, platelet-poor plasma, steroid preparations, etc. This method is low cost and less invasive, and early clinical applications have shown good efficacy. In this paper, we have reviewed clinical research progress in treating MPS with TPI therapy.

Efficacy of different low-level laser therapy sessions in the management of masseter muscle trigger points

BackgroundLow-level laser therapy (LLLT) is one of the recent treatment modalities for myofascial pain dysfunction syndrome with trigger points. The objective of the present study was to examine the impact of varying LLLT sessions on the treatment of masseter muscle trigger points.Methods90 patients diagnosed with orofacial pain and trigger points in the masseter muscle for at least 6 months were selected and divided into 3 groups (n = 30) based on the number of LLLT sessions provided to patients. Patients in Group I received one session/per week, group II received two sessions/per week, and Group III received three sessions/per week. The sessions continued for 4 weeks, evaluations of pain levels, maximum mouth opening (MMO), and quality of life were conducted before and after the procedure at 1, 2, 3, 4, and 8 weeks.ResultsThe pain scores exhibited a highly statistically significant difference among the three groups (p < 0.001) over the 8-week study period. MMO was statistically significantly different between groups at week 4 and week 8. The Oral Health Impact Profile-14 (OHIP-14) score was statistically significant difference between groups at week 8. The time showed a highly significant effect on the study outcomes within each group.ConclusionIncreased the number of LLLT sessions reduced the pain improved the MMO, and subsequently improved the quality of life.ClinicalTrials.gov IDNCT06327204 - retrospectively registered.

Frequency of Trigger Points in Lower Extremity Muscles Among Runners with Plantar Fasciitis

Frequency of Trigger Points in Lower Extremity Muscles Among Runners with Plantar Fasciitis

Effects of dry needling on vertical jump performance in female volleyball players. A randomized controlled trial.

Injury prevention and performance enhancement are paramount goals in sports. Myofascial Pain Syndrome, primarily caused by myofascial trigger points, can result in referred pain, stiffness, muscle shortening, and weakness. This study aimed to assess the impact of dry needling (DN) on latent myofascial trigger points on vertical jump performance in female volleyball players. A single-blind, randomized controlled clinical trial was conducted with twenty-six healthy female volleyball players who had no lower limb injuries in the last six months, exhibited latent trigger points in the triceps surae muscles, and were familiar with the countermovement jump test. Participants were randomly assigned to either a control group or an experimental group (which received a single DN session). Vertical jump performance variables, including jump height as the primary outcome, were assessed using a force platform at five time points: before the intervention, immediately post-treatment, 24 h post-treatment, 72 h post-treatment, and one-week post-intervention. The experimental group showed significantly lower values for vertical jump height, flight time, velocity, strength, and power immediately after the needling intervention (p < 0.05). However, these values were significantly higher one-week post-intervention across all variables (p < 0.01). These findings indicate that DN initially decreases jumping performance, but improvements are observed one week after the intervention. In the comparison between groups, the experimental group exhibited higher values at the one-week follow-up for vertical jump height, flight time, speed, and power compared to the control group (p < 0.05). DN appears to be an effective technique for improving vertical jump performance in female volleyball players one week after its application. ClinicalTrials.gov, identifier (NCT06184672).

Sex-Based Differences in Pressure Pain Thresholds of Myofascial Trigger Points in Cervical and Cranial Muscles in Tension-Type Headache: A Cross-Sectional Study

Sex-Based Differences in Pressure Pain Thresholds of Myofascial Trigger Points in Cervical and Cranial Muscles in Tension-Type Headache: A Cross-Sectional Study

The effects of high intensity laser therapy and dry needling on clinical signs in females with upper trapezius muscle active trigger points: A single blinded randomized clinical trial

ObjectiveOne of the main contributors to musculoskeletal pain syndromes are myofascial trigger points (MTrPs), which are characterized by discomfort, tenderness, and restricted range of motion (ROM). In this study, patients with upper trapezius myofascial pain syndrome had their pain intensity, cervical range of motion, and disability evaluated in relation to the effectiveness of high intensity laser therapy and dry needling. Methods32 participants with active upper trapezius myofascial trigger points were split into two groups at random: one group received high intensity laser treatment (n = 16), while the other received dry needling (n = 16). All participants got relevant intervention twice weekly throughout the three weeks of treatment sessions (5 sessions). Before and after the intervention, the cervical range of movements, disability and Pain intensity were all assessed by iPhone inclinometer & goniometer, neck disability index and visual analog scale respectively. ResultsThe visual analog scale and neck disability index significantly reduced post-intervention in both groups (P < 0.001). Moreover, the cervical range of motions significantly increased in both groups (P < 0.05). However, there was no significant difference in pain intensity, neck disability index and the cervical range of motions between the two groups (P > 0.05). ConclusionActive myofascial trigger points in the upper trapezius muscle may be effectively treated with dry needling or high-intensity laser therapy.

High Medial Longitudinal Arch of the Foot and Latent Trigger Points in Lower Limb Muscles.

Background: The objective was to evaluate the prevalence of latent trigger points (LTrPs) in lower limb muscles in participants with a high medial longitudinal arch (MLA) of the foot compared to controls. Methods: Participants with a navicular drop test of 4-9 mm were included in the control group; the high MLA group included navicular drop test values of ≤4 mm. The presence of LTrPs was assessed by palpation techniques. The muscles evaluated were medial gastrocnemius (LTrP1), lateral gastrocnemius (LTrP2), soleus (LTrP1), peroneus longus, peroneus brevis, tibialis anterior, extensor digitorum longus, flexor digitorum longus, rectus femoris, vastus medialis (LTrP1 and LTrP2), and the vastus lateralis of the quadriceps (LTrP1 and LTrP2). Results: Thirty-seven participants with high MLA and thirty-seven controls were included in the study. Twenty-nine (78.4%) participants in the high MLA group had at least 1 LTrP, compared to twenty-three (62.2%) in the control group. No statistical difference (p < 0.05) was found in the total number of LTrPs between groups (4.46 ± 3.78 vs. 3.24 ± 3.85). There were more participants (p < 0.05) with LTrPs in the tibialis anterior, extensor digitorum longus, and vastus lateralis (LTrP1 and LTrP2) in the high MLA group than in the control group. Conclusion: Although no differences were found in the number of total LTrPs between groups, the prevalence was statistically significantly higher in the tibialis anterior, extensor digitorum longus, and vastus lateralis of the participants with high MLA of the foot.

Sexual function in women with endometriosis and pelvic floor myofascial pain syndrome.

To evaluate and compare the sexual function and pelvic floor muscles (PFM) function of women with endometriosis and chronic pelvic pain (CPP) with and without Myofascial Pelvic Pain Syndrome (MPPS). Cross-sectional study conducted between January 2018 and December 2020. Women with deep endometriosis underwent assessments for trigger points (TP) and PFM function using the PERFECT scale. Electromyographic activity (EMG) and sexual function through Female Sexual Function Index (FSFI) were assessed. Statistical analyses included chi-square and Mann-Whitney tests. There were 46 women. 47% had increased muscle tone and 67% related TP in levator ani muscle (LAM). Weakness in PFM, with P≤2 was noted in 82% and P≥3 in only 17%. Incomplete relaxation of PFM presented in 30%. EMG results were resting 6.0, maximal voluntary isometric contraction (MVIC) 61.9 and Endurance 14.2; FSFI mean total score 24.7. We observed an association between increased muscle tone (P<.001), difficulty in relaxation (P=.019), and lower Endurance on EMG (P=.04) in women with TP in LAM. Participants with TP presented lower total FSFI score (P=.02). TP in the right OIM presented increased muscle tone (P=.01). TP in the left OIM presented lower values to function of PFM by PERFECT (P=.005), and in MVIC (P=.03) on EMG. Trigger points (TP) in pelvic floor muscles (PFM) and obturator internus muscle (OIM) correlates with poorer PFM and sexual function, particularly in left OIM TP cases. Endometriosis and chronic pelvic pain raise muscle tone, weaken muscles, hinder relaxation, elevate resting electrical activity, lower maximum voluntary isometric contraction, and reduce PFM endurance.

Efficacy and factors of myofascial release therapy combined with electrical and magnetic stimulation in the treatment of chronic pelvic pain syndrome.

The objective of this study was to evaluate the efficacy and factors of myofascial release therapy combined with electrical and magnetic stimulation in the treatment of chronic pelvic pain syndrome (CPPS). A total of 79 female patients diagnosed with CPPS from January 2021 to December 2022 were prospectively analyzed. Every patient received 3 weeks of treatment which included myofascial release therapy combined with electrical and magnetic stimulation. The visual analog score (VAS) of pelvic floor muscle (PFM) trigger points (TrPs) and the changes in pelvic floor surface electromyography before and after treatment were compared. Multiple linear regression was used to analyze the influencing factors of each outcome index. There were significant differences in VASs of muscle TrPs before and after treatment (P < 0.05). For the surface electromyography of PFMs, the differences in pre-baseline rest, post-baseline rest, isometric contractions for muscle endurance evaluation, and coefficient of variation were statistically significant (P < 0.05). Linear regression analysis showed that disease course (X 1), dyspareunia (X 5), and urinary incontinence (X 6) were influencing factors for the decline of pre-baseline rest (r5 = 1.067, R 2 = 0.089), post-baseline rest (r1 = 0.055, r5 = 0.99, R 2 = 0.119), VASs of ischial spine (r5 = 0.916, R 2 = 0.102), obturator internus (r5 = 0.796, r6 = -0.703, R 2 = 0.245), and pubococcygeus (r5 = 0.885, R 2 = 0.149) after treatment in the CPPS group. This study confirmed that individualized myofascial release therapy combined with electrical and magnetic stimulation has significant efficacy for patients with CPPS. At the same time, it is more effective for CPPS patients with longer course of disease, dyspareunia, and without urinary incontinence.

EFFICACY OF BOTULINUM TOXIN TYPE A IN REDUCING CHRONIC TENSION HEADACHE IN PATIENTS WITH TEMPOROMANDIBULAR JOINT DYSFUNCTION

There is a notable prevalence of temporomandibular joint dysfunction, reaching approximately 34% in the general population according to the recent studies. Individuals with such dysfunction often experience tension headaches due to increased tension in the masticatory muscles, a key symptom of temporomandibular joint dysfunction. Botulinum toxin type A injections into these muscles are utilized to alleviate the dysfunction, as this drug inhibits neuromuscular impulses, thereby reducing muscle tension. This study aimed to assess the efficacy of alleviating chronic tension headaches in patients with temporomandibular joint dysfunction through botulinum toxin type A injections into trigger points of the masticatory muscles. Sixty patients exhibiting signs of temporomandibular joint dysfunction and chronic tension headaches participated in the study. They were randomly assigned to either an experimental group receiving botulinum toxin type A injections or a control group receiving saline injections into the masticatory muscles. Injections were administered at sites with the highest muscle tension in the masseter and temporalis muscles. The reduction in chronic tension-type headaches was evaluated using a visual analogue pain scale. The results indicated a statistically significant decrease in headache intensity in the experimental group compared to the control group (P&lt;0.001). Furthermore, the experimental group demonstrated significant treatment efficacy based on headache intensity before and after 12 weeks from the drug administration date (P&lt;0.001).

Evaluating the Effectiveness of Radiofrequency Therapy and Manual Pelvic Fascial Release in Treating Myofascial Pelvic Pain.

Myofascial pelvic pain (MFPP), characterized by sensitive trigger points in the pelvic floor muscles, leads to chronic pain and affects various aspects of life. Despite the availability of different treatment modalities, there is limited comparative research on their effectiveness. This study compares radiofrequency (RF) therapy and myofascial manual therapy (MMT) in treating MFPP. We aimed to evaluate pelvic floor muscle strength changes, clinical symptoms, and patient comfort during treatment. The study involved 176 participants, divided equally into RF and MMT groups. We assessed pelvic floor pain using the Visual Analogue Scale (VAS), muscle strength using the Modified Oxford Scale (MOS) and surface electromyography (sEMG), clinical symptom improvement through questionnaires, and patient discomfort during treatment. Both RF and MMT groups significantly reduced pelvic floor and paraurethral muscle pain (VAS scores, p < 0.001). RF treatment significantly decreased vaginal laxity in its group (p < 0.001), with no notable change in the MMT group (p = 0.818). RF therapy also resulted in greater patient comfort than MMT (p < 0.001). Although both treatments improved clinical symptoms, there was no significant difference between the two (p = 0.692). MOS scores and pelvic floor sEMG values showed no significant differences between the groups before and after treatment (p > 0.05). Both RF and MMT effectively alleviate pelvic floor pain and improve clinical symptoms in MFPP patients. RF therapy, however, offers additional benefits in reducing vaginal laxity and enhancing treatment comfort.

Effect of INIT in Treatment of Myofascial Trigger Points in Rhomboid muscle: A Case Report

Effect of INIT in Treatment of Myofascial Trigger Points in Rhomboid muscle: A Case Report

Dental patients' tinnitus profile: prevalence, types, and associated factors with oral and maxillofacial diseases.

Maxillofacial diseases may pose a risk factor for the onset of tinnitus, and may influence the severity of its symptoms. The objective of this study was to investigate the prevalence of tinnitus among patients routinely visiting the Faculty of Dentistry and to assess the relationship between tinnitus and maxillofacial diseases. This was a prospective cross-sectional study conducted on 3,626 patients. Demographic data, information on tinnitus symptoms, temporomandibular disorder (TMD) presence, the existence of trigger points in masticatory muscles, toothache, and bruxism were evaluated. Tinnitus was detected in 385 patients, resulting in a prevalence rate of 10.61%. Of the patients, 38.4% were male and 61.6% were female, and the mean age was 42.66 ± 16.34 years. Tinnitus was categorised as normal in 47.8% of the patients and pathological in 52.2% of the patients. Bruxism was identified in 65.5% of the patients, toothache in 42.9%, TMD in 33.8%, and masticatory trigger points in 27.0% of the patients. A tendency towards tinnitus provoked by toothache was observed in 5.9% of the patients. The presence of pathological tinnitus was found to increase the risk by 1.839 times for toothache and 1.456 times for bruxism. There may be an association between oral and maxillofacial diseases and tinnitus, especially bruxism and toothache. Therefore, the evaluation of these conditions may be a routine part of tinnitus management.

Comparing Myofascial Pain Syndrome Treatment with Dry Needling Versus Extracorporeal Shock Wave Therapy for Plantar Fasciitis on Pain and Function of the Heel

The aim of this study was to compare the effects of dry needling (DN) and extracorporeal shock wave therapy (ESWT) in the treatment of plantar fasciitis (PF). The study included 55 patients with PF. The patients were randomly divided into 2 groups. The DN group applied 3 sessions of DN to the myofascial trigger points in the lower limb muscles. The ESWT group applied 3 sessions of ESWT to the plantar fascia. For clinical evaluation, we used a visual analog scale (VAS) (first step, rest, activity) and Foot Function Index (FFI) (pain, disability, activity). Assessments were done baseline, post-treatment first week, and fourth week. Maximum pain-free standing time (Max PfST) and maximum pain-free walking distance (Max PfWD) were recorded at baseline and post-treatment fourth week. In this study, we found significant improvement in VAS, FFI, Max PfST, and Max PfWD in both groups (p<0.01). VAS-activity baseline-forth week change was significantly superior in the DN group compared to the ESWT group (p=0.023). FFI-disability baseline-fourth week change was significantly superior in the DN group compared to the ESWT group (p=0.048). There was no significant difference in other treatment-related changes between the groups (p>0.05). However, VAS-rest baseline-fourth week change and FFI-pain baseline-fourth week change trended towards statistical significance between groups ((p=0.056), (p=0.052) respectively). This study showed that DN may be a good alternative treatment for patients with PF, with effects similar to or even superior to ESWT.

Anatomical Bases of the Temporal Muscle Trigger Points.

Temporal muscles of 14 adult cadavers were studied. The muscle bellies were divided into six areas, three superior (1.2 and 3) and three inferior areas (4, 5, and 6) lower, according to a Cartesian plane to analyze and describe the entry points of the branches of the deep temporal nerves into the muscle. The branching distribution was analyzed using Poisson log-linear tests with Bonferroni post hoc tests for comparison between groups (sextants) (p < 0.05). Deep temporal nerve entry points were found in the temporal muscle in all areas. Most of the branches were observed in areas 2 and 5, which coincide with the muscle fibers responsible for mandible elevation and related to the previously described MTPs. Fewer branches were found in areas 1 and 6, where contraction produces mandible retraction. There is an anatomical correlation between the branching pattern of the deep temporal nerve and temporal muscle trigger points. Adequate knowledge of the innervation of the temporal muscle may help elucidate the pathophysiology of myofascial syndromes and provide a rational basis for interventional or conservative approaches and help surgeons avoid iatrogenic lesions to the deep temporal nerve lesion.

Efficacy of trigger point injection therapy in noncardiac chest pain: A randomized controlled trial.

This study aimed to compare the effects of trigger point injections and stretching exercises in patients with noncardiac chest pain (NCCP) associated with myofascial pain syndrome. This prospective randomized controlled trial included 50 patients with noncardiac chest pain and trigger points in the pectoralis muscles between October 2019 and June 2020. The patients were randomly assigned to receive trigger point injections into the pectoralis muscles and exercise (n=25; 15 males, 10 females; mean age: 42.8±9.2 years; range, 25 to 57 years) or only perform exercise (n=25; 11 males, 14 females; mean age: 41.8±11.2 years; range, 18 to 60 years). The primary outcome was pain intensity at the first month and three months after the first treatment session, measured using the Visual Analog Scale from 0 to 100. The secondary outcome was the Nottingham Health Profile score. Treatment with stretching exercises and trigger point injection resulted in significant pain reduction compared to stretching exercises alone, and the reduction was persistent at the three-month follow-up (p<0.001). A between-group comparison showed no significant difference in the Nottingham Health Profile (p=0.522). Complications related to the procedure or severe adverse events attributable to treatment were not reported. Trigger point injection combined with stretching exercises is an efficient treatment for noncardiac chest pain related to myofascial pain syndrome compared to exercise treatment alone.

WITHDRAWN: Detection of myofascial trigger points in the masseter muscle using ultrasonography in patients with myogenous temporomandibular disorder

We aimed to investigate the diagnostic efficacy of ultrasonography (US) using gray scale B-mode and ultrasound elastography (UE) in detecting myofascial trigger points (MTPs) in the masseter muscles of patients with myogenous temporomandibular disorder (TMD). A diagnostic cross-sectional study of patients with MTPs in the masseter muscles using US was conducted. The diagnostic results from the US examinations were compared with the clinical examination reference standard to determine the diagnostic efficacy of US. MTPs were detected as band-like hypoechoic localized areas with reduced vibration amplitude (stiffer) under US B-mode and UE imaging. In total, 116 sites from 29 patients (3 males, 26 females) with a mean age of 39.4 years were examined. US exhibited sensitivity of .946 (95% CI: .851-.989) and specificity of .900 (95% CI: .795-.962) in detecting MTPs when compared to the clinical examination. Diagnostic accuracy ranged from .902 to .950 when assuming 3 levels of myogenous TMD prevalence. US B-mode and UE imaging exhibited diagnostic accuracy comparable to the standard clinical examination carried out by a trained specialist. It can be a reliable technique in the detection and localization of MTPs for the diagnosis of myogenous TMD and localization of MTPs for therapeutic purposes.

Efficacy of Positional Release Therapy Versus Deep Transverse Frictional Massage on Quadratus Lumborum Strain among IT Workers

Background: The study was designed to inspect the effectiveness of Positional Release Therapy (PRT) and DeepTransverse Frictional Massage (DTFM) on Quadratus Lumborum Strain.Purpose: The purpose of this study is to compare the efficacy of Positional Release and Deep Transverse FrictionalMassage for Quadratus Lumborum.Materials and Methods: Sixty subjects with Trigger Points in quadratus lumborum muscle were divided randomlyinto two equal groups. Group “PRT” received Positional Release Therapy five times/week while Group “DTFM”received Deep Transverse Frictional Massage five times/week for two weeks. Numeric Pain Rating Scale (NPRS),Universal Goniometer were used to evaluate subjects at two intervals (Pre-Treatment and Post-Treatment).Theentire process was performed from November 2022 to March 2023.Result: The results of the study revealed that both the interventions were effective but in terms of superiority PRTgave a significant result than DTFM.Conclusion: Based on the study results, it was concluded that PRT was found to be more effective for the treatmentof Quadratus Lumborum strain.

Myotonometric Assessment of the Short-Term Effects of Manual Therapy on Upper Trapezius Myofascial Trigger Points

(1) Background: The aim of this study was to assess the short-term effects of one manual therapeutic intervention by quantifying the biomechanical and viscoelastic properties of upper trapezius myofascial trigger points. (2) Materials and Methods: Fourteen volunteer subjects (six males and eight females) aged 22 to 47 years, with myofascial trigger points in the upper trapezius muscle on both sides participated in this study. The biomechanical and viscoelastic properties were assessed with the Myoton Pro (Estonia) before the application of manual therapy (T0), then immediately after the end of the treatment session (T1) and finally one hour after the end of the treatment session (T2) in order to evaluate the effectiveness of the applied treatment. (3) Results: The oscillation frequency in the right upper trapezius muscle was significantly lower than in the left upper trapezius muscle both immediately, after the end of the manual therapy session (p = 0.03) and one hour after the session (p = 0.03). Regarding the state of tension in the right upper trapezius, a significant decrease was observed one hour after treatment compared to baseline (p = 0.04). In the left upper trapezius muscle, one hour after treatment, the dynamic stiffness value was significantly higher than in the right upper trapezius (p = 0.01). (4) Conclusions: Myotonometry could become a useful method to assess the biomechanical and viscoelastic properties of muscles, identifying trigger points and monitoring the results of therapy.

COMPARISON OF THE EFFECTIVENESS OF MYOFASCIAL PAIN REDUCTION USING LOW-INTENSITY LASER AND RED LED LIGHT THERAPY IN PATIENTS WITH TEMPORO¬MANDIBULAR JOINT DYSFUNCTION

Introduction: Today, there is a significant prevalence of temporomandibular joint (TMJ) dysfunction, which currently ranges from 21.5 % to 50.5 %. This disease can worsen the patient's quality of life due to the presence of pain, which is the main symptom of this pathology. To reduce the intensity of pain in patients with TMJ dysfunction, low-level laser and red LED light therapy is used. There are a significant number of studies proving clinical efficacy in alleviating the symptoms of TMJ dysfunction using various methods of light therapy, but the number of studies comparing the effectiveness of different light therapy options among themselves is quite limited. The aim of the study was to compare the effectiveness of pain relief and the number of trigger points in patients with TMJ dysfunction using a low-level laser and red LED light. Materials and methods: 60 patients were randomised into 2 groups. Randomisation for patient allocation was performed using Microsoft Excel 2016. Patients of group I received red LED light therapy, radiation sources were applied to the trigger points of the masticatory muscles extracorporeally for 5 minutes. Patients in group II received low-intensity laser therapy for 30 seconds on the trigger points of the masseter muscles extracorporeally. Patients in both study groups received therapy weekly for 4 weeks. The effectiveness of the treatment was assessed by filling out a visual analogue scale (VAS), the number of trigger points of the masticatory muscles and the force of contraction of the masticatory muscles at rest and during tooth contact in patients with temporomandibular joint dysfunction. Results: the VAS scores in group I decreased by 47.02 % from the start of treatment, in group II – by 53.7 %. The number of trigger points in the projection of the masticatory, temporal muscles and parotid region in group I decreased by 62.34 %, in group II – by 72.21 %. According to electromyography, in group I, the amplitude of bioelectrical impulses of the masticatory muscles at rest decreased by 20.58 % on average, and in the state of voluntary teeth clenching – by 22.89 %. In group II, the amplitude of bioelectrical impulses of the masticatory muscles at rest decreased by 25.58 % on average, and in the state of voluntary teeth clenching – by 28.37 %. Conclusions: red LED light therapy and low-level laser therapy reduces pain intensity and the number of trigger points in patients with myofascial pain. Comparison of the effectiveness of red LED light therapy and laser therapy in reducing pain syndrome showed a higher ability of laser therapy to reduce myofascial pain and the number of trigger points in patients with temporomandibular joint dysfunction (p&lt;0.01).